sphinx.addnodesdocument)}( rawsource children]( translations
LanguagesNode)}(hhh](h pending_xref)}(hhh]docutils.nodesTextChinese (Simplified)}parenthsba
attributes}(ids]classes]names]dupnames]backrefs] refdomainstdreftypedoc reftarget(/translations/zh_CN/hwmon/dell-smm-hwmonmodnameN classnameN refexplicitutagnamehhh ubh)}(hhh]hChinese (Traditional)}hh2sbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/zh_TW/hwmon/dell-smm-hwmonmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hItalian}hhFsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/it_IT/hwmon/dell-smm-hwmonmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hJapanese}hhZsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/ja_JP/hwmon/dell-smm-hwmonmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hKorean}hhnsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/ko_KR/hwmon/dell-smm-hwmonmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hSpanish}hhsbah }(h ]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/sp_SP/hwmon/dell-smm-hwmonmodnameN classnameN refexplicituh1hhh ubeh }(h ]h ]h"]h$]h&]current_languageEnglishuh1h
hh _documenthsourceNlineNubhcomment)}(h)SPDX-License-Identifier: GPL-2.0-or-laterh]h)SPDX-License-Identifier: GPL-2.0-or-later}hhsbah }(h ]h ]h"]h$]h&] xml:spacepreserveuh1hhhhhhB/var/lib/git/docbuild/linux/Documentation/hwmon/dell-smm-hwmon.rsthKubh)}(h4This data file has been placed in the public domain.h]h4This data file has been placed in the public domain.}hhsbah }(h ]h ]h"]h$]h&]hhuh1hhhhhho/srv/docbuild/lib/venvs/build-kernel-docs/lib64/python3.9/site-packages/docutils/parsers/rst/include/isonum.txthKubh)}(hDerived from the Unicode character mappings available from
.
Processed by unicode2rstsubs.py, part of Docutils:
.h]hDerived from the Unicode character mappings available from
.
Processed by unicode2rstsubs.py, part of Docutils:
.}hhsbah }(h ]h ]h"]h$]h&]hhuh1hhhhhhhhKubhsubstitution_definition)}(h*.. |amp| unicode:: U+00026 .. AMPERSANDh]h&}hhsbah }(h ]h ]h"]ampah$]h&]uh1hhhhKhhhhubh)}(h+.. |apos| unicode:: U+00027 .. APOSTROPHEh]h'}hhsbah }(h ]h ]h"]aposah$]h&]uh1hhhhKhhhhubh)}(h).. |ast| unicode:: U+0002A .. ASTERISKh]h*}hhsbah }(h ]h ]h"]astah$]h&]uh1hhhhK hhhhubh)}(h+.. |brvbar| unicode:: U+000A6 .. BROKEN BARh]h¦}hj sbah }(h ]h ]h"]brvbarah$]h&]uh1hhhhK
hhhhubh)}(h0.. |bsol| unicode:: U+0005C .. REVERSE SOLIDUSh]h\}hj sbah }(h ]h ]h"]bsolah$]h&]uh1hhhhK hhhhubh)}(h*.. |cent| unicode:: U+000A2 .. CENT SIGNh]h¢}hj sbah }(h ]h ]h"]centah$]h&]uh1hhhhK hhhhubh)}(h&.. |colon| unicode:: U+0003A .. COLONh]h:}hj- sbah }(h ]h ]h"]colonah$]h&]uh1hhhhK
hhhhubh)}(h&.. |comma| unicode:: U+0002C .. COMMAh]h,}hj< sbah }(h ]h ]h"]commaah$]h&]uh1hhhhKhhhhubh)}(h... |commat| unicode:: U+00040 .. COMMERCIAL ATh]h@}hjK sbah }(h ]h ]h"]commatah$]h&]uh1hhhhKhhhhubh)}(h/.. |copy| unicode:: U+000A9 .. COPYRIGHT SIGNh]h©}hjZ sbah }(h ]h ]h"]copyah$]h&]uh1hhhhKhhhhubh)}(h... |curren| unicode:: U+000A4 .. CURRENCY SIGNh]h¤}hji sbah }(h ]h ]h"]currenah$]h&]uh1hhhhKhhhhubh)}(h0.. |darr| unicode:: U+02193 .. DOWNWARDS ARROWh]h↓}hjx sbah }(h ]h ]h"]darrah$]h&]uh1hhhhKhhhhubh)}(h,.. |deg| unicode:: U+000B0 .. DEGREE SIGNh]h°}hj sbah }(h ]h ]h"]degah$]h&]uh1hhhhKhhhhubh)}(h... |divide| unicode:: U+000F7 .. DIVISION SIGNh]h÷}hj sbah }(h ]h ]h"]divideah$]h&]uh1hhhhKhhhhubh)}(h,.. |dollar| unicode:: U+00024 .. DOLLAR SIGNh]h$}hj sbah }(h ]h ]h"]dollarah$]h&]uh1hhhhKhhhhubh)}(h,.. |equals| unicode:: U+0003D .. EQUALS SIGNh]h=}hj sbah }(h ]h ]h"]equalsah$]h&]uh1hhhhKhhhhubh)}(h1.. |excl| unicode:: U+00021 .. EXCLAMATION MARKh]h!}hj sbah }(h ]h ]h"]exclah$]h&]uh1hhhhKhhhhubh)}(h9.. |frac12| unicode:: U+000BD .. VULGAR FRACTION ONE HALFh]h½}hj sbah }(h ]h ]h"]frac12ah$]h&]uh1hhhhKhhhhubh)}(h<.. |frac14| unicode:: U+000BC .. VULGAR FRACTION ONE QUARTERh]h¼}hj sbah }(h ]h ]h"]frac14ah$]h&]uh1hhhhKhhhhubh)}(h;.. |frac18| unicode:: U+0215B .. VULGAR FRACTION ONE EIGHTHh]h⅛}hj sbah }(h ]h ]h"]frac18ah$]h&]uh1hhhhKhhhhubh)}(h?.. |frac34| unicode:: U+000BE .. VULGAR FRACTION THREE QUARTERSh]h¾}hj sbah }(h ]h ]h"]frac34ah$]h&]uh1hhhhKhhhhubh)}(h>.. |frac38| unicode:: U+0215C .. VULGAR FRACTION THREE EIGHTHSh]h⅜}hj sbah }(h ]h ]h"]frac38ah$]h&]uh1hhhhK hhhhubh)}(h=.. |frac58| unicode:: U+0215D .. VULGAR FRACTION FIVE EIGHTHSh]h⅝}hj sbah }(h ]h ]h"]frac58ah$]h&]uh1hhhhK hhhhubh)}(h>.. |frac78| unicode:: U+0215E .. VULGAR FRACTION SEVEN EIGHTHSh]h⅞}hj, sbah }(h ]h ]h"]frac78ah$]h&]uh1hhhhK hhhhubh)}(h2.. |gt| unicode:: U+0003E .. GREATER-THAN SIGNh]h>}hj; sbah }(h ]h ]h"]gtah$]h&]uh1hhhhK hhhhubh)}(h9.. |half| unicode:: U+000BD .. VULGAR FRACTION ONE HALFh]h½}hjJ sbah }(h ]h ]h"]halfah$]h&]uh1hhhhK hhhhubh)}(h/.. |horbar| unicode:: U+02015 .. HORIZONTAL BARh]h―}hjY sbah }(h ]h ]h"]horbarah$]h&]uh1hhhhK!hhhhubh)}(h'.. |hyphen| unicode:: U+02010 .. HYPHENh]h‐}hjh sbah }(h ]h ]h"]hyphenah$]h&]uh1hhhhK"hhhhubh)}(h:.. |iexcl| unicode:: U+000A1 .. INVERTED EXCLAMATION MARKh]h¡}hjw sbah }(h ]h ]h"]iexclah$]h&]uh1hhhhK#hhhhubh)}(h7.. |iquest| unicode:: U+000BF .. INVERTED QUESTION MARKh]h¿}hj sbah }(h ]h ]h"]iquestah$]h&]uh1hhhhK$hhhhubh)}(hJ.. |laquo| unicode:: U+000AB .. LEFT-POINTING DOUBLE ANGLE QUOTATION MARKh]h«}hj sbah }(h ]h ]h"]laquoah$]h&]uh1hhhhK%hhhhubh)}(h0.. |larr| unicode:: U+02190 .. LEFTWARDS ARROWh]h←}hj sbah }(h ]h ]h"]larrah$]h&]uh1hhhhK&hhhhubh)}(h3.. |lcub| unicode:: U+0007B .. LEFT CURLY BRACKETh]h{}hj sbah }(h ]h ]h"]lcubah$]h&]uh1hhhhK'hhhhubh)}(h;.. |ldquo| unicode:: U+0201C .. LEFT DOUBLE QUOTATION MARKh]h“}hj sbah }(h ]h ]h"]ldquoah$]h&]uh1hhhhK(hhhhubh)}(h).. |lowbar| unicode:: U+0005F .. LOW LINEh]h_}hj sbah }(h ]h ]h"]lowbarah$]h&]uh1hhhhK)hhhhubh)}(h1.. |lpar| unicode:: U+00028 .. LEFT PARENTHESISh]h(}hj sbah }(h ]h ]h"]lparah$]h&]uh1hhhhK*hhhhubh)}(h4.. |lsqb| unicode:: U+0005B .. LEFT SQUARE BRACKETh]h[}hj sbah }(h ]h ]h"]lsqbah$]h&]uh1hhhhK+hhhhubh)}(h;.. |lsquo| unicode:: U+02018 .. LEFT SINGLE QUOTATION MARKh]h‘}hj sbah }(h ]h ]h"]lsquoah$]h&]uh1hhhhK,hhhhubh)}(h/.. |lt| unicode:: U+0003C .. LESS-THAN SIGNh]h<}hj
sbah }(h ]h ]h"]ltah$]h&]uh1hhhhK-hhhhubh)}(h+.. |micro| unicode:: U+000B5 .. MICRO SIGNh]hµ}hj sbah }(h ]h ]h"]microah$]h&]uh1hhhhK.hhhhubh)}(h+.. |middot| unicode:: U+000B7 .. MIDDLE DOTh]h·}hj+ sbah }(h ]h ]h"]middotah$]h&]uh1hhhhK/hhhhubh)}(h/.. |nbsp| unicode:: U+000A0 .. NO-BREAK SPACEh]h }hj: sbah }(h ]h ]h"]nbspah$]h&]uh1hhhhK0hhhhubh)}(h).. |not| unicode:: U+000AC .. NOT SIGNh]h¬}hjI sbah }(h ]h ]h"]notah$]h&]uh1hhhhK1hhhhubh)}(h,.. |num| unicode:: U+00023 .. NUMBER SIGNh]h#}hjX sbah }(h ]h ]h"]numah$]h&]uh1hhhhK2hhhhubh)}(h).. |ohm| unicode:: U+02126 .. OHM SIGNh]hΩ}hjg sbah }(h ]h ]h"]ohmah$]h&]uh1hhhhK3hhhhubh)}(h;.. |ordf| unicode:: U+000AA .. FEMININE ORDINAL INDICATORh]hª}hjv sbah }(h ]h ]h"]ordfah$]h&]uh1hhhhK4hhhhubh)}(h<.. |ordm| unicode:: U+000BA .. MASCULINE ORDINAL INDICATORh]hº}hj sbah }(h ]h ]h"]ordmah$]h&]uh1hhhhK5hhhhubh)}(h-.. |para| unicode:: U+000B6 .. PILCROW SIGNh]h¶}hj sbah }(h ]h ]h"]paraah$]h&]uh1hhhhK6hhhhubh)}(h-.. |percnt| unicode:: U+00025 .. PERCENT SIGNh]h%}hj sbah }(h ]h ]h"]percntah$]h&]uh1hhhhK7hhhhubh)}(h*.. |period| unicode:: U+0002E .. FULL STOPh]h.}hj sbah }(h ]h ]h"]periodah$]h&]uh1hhhhK8hhhhubh)}(h*.. |plus| unicode:: U+0002B .. PLUS SIGNh]h+}hj sbah }(h ]h ]h"]plusah$]h&]uh1hhhhK9hhhhubh)}(h0.. |plusmn| unicode:: U+000B1 .. PLUS-MINUS SIGNh]h±}hj sbah }(h ]h ]h"]plusmnah$]h&]uh1hhhhK:hhhhubh)}(h+.. |pound| unicode:: U+000A3 .. POUND SIGNh]h£}hj sbah }(h ]h ]h"]poundah$]h&]uh1hhhhK;hhhhubh)}(h... |quest| unicode:: U+0003F .. QUESTION MARKh]h?}hj sbah }(h ]h ]h"]questah$]h&]uh1hhhhKhhhhubh)}(h1.. |rarr| unicode:: U+02192 .. RIGHTWARDS ARROWh]h→}hj sbah }(h ]h ]h"]rarrah$]h&]uh1hhhhK?hhhhubh)}(h4.. |rcub| unicode:: U+0007D .. RIGHT CURLY BRACKETh]h}}hj* sbah }(h ]h ]h"]rcubah$]h&]uh1hhhhK@hhhhubh)}(h<.. |rdquo| unicode:: U+0201D .. RIGHT DOUBLE QUOTATION MARKh]h”}hj9 sbah }(h ]h ]h"]rdquoah$]h&]uh1hhhhKAhhhhubh)}(h0.. |reg| unicode:: U+000AE .. REGISTERED SIGNh]h®}hjH sbah }(h ]h ]h"]regah$]h&]uh1hhhhKBhhhhubh)}(h2.. |rpar| unicode:: U+00029 .. RIGHT PARENTHESISh]h)}hjW sbah }(h ]h ]h"]rparah$]h&]uh1hhhhKChhhhubh)}(h5.. |rsqb| unicode:: U+0005D .. RIGHT SQUARE BRACKETh]h]}hjf sbah }(h ]h ]h"]rsqbah$]h&]uh1hhhhKDhhhhubh)}(h<.. |rsquo| unicode:: U+02019 .. RIGHT SINGLE QUOTATION MARKh]h’}hju sbah }(h ]h ]h"]rsquoah$]h&]uh1hhhhKEhhhhubh)}(h-.. |sect| unicode:: U+000A7 .. SECTION SIGNh]h§}hj sbah }(h ]h ]h"]sectah$]h&]uh1hhhhKFhhhhubh)}(h*.. |semi| unicode:: U+0003B .. SEMICOLONh]h;}hj sbah }(h ]h ]h"]semiah$]h&]uh1hhhhKGhhhhubh)}(h,.. |shy| unicode:: U+000AD .. SOFT HYPHENh]h}hj sbah }(h ]h ]h"]shyah$]h&]uh1hhhhKHhhhhubh)}(h(.. |sol| unicode:: U+0002F .. SOLIDUSh]h/}hj sbah }(h ]h ]h"]solah$]h&]uh1hhhhKIhhhhubh)}(h,.. |sung| unicode:: U+0266A .. EIGHTH NOTEh]h♪}hj sbah }(h ]h ]h"]sungah$]h&]uh1hhhhKJhhhhubh)}(h0.. |sup1| unicode:: U+000B9 .. SUPERSCRIPT ONEh]h¹}hj sbah }(h ]h ]h"]sup1ah$]h&]uh1hhhhKKhhhhubh)}(h0.. |sup2| unicode:: U+000B2 .. SUPERSCRIPT TWOh]h²}hj sbah }(h ]h ]h"]sup2ah$]h&]uh1hhhhKLhhhhubh)}(h2.. |sup3| unicode:: U+000B3 .. SUPERSCRIPT THREEh]h³}hj sbah }(h ]h ]h"]sup3ah$]h&]uh1hhhhKMhhhhubh)}(h4.. |times| unicode:: U+000D7 .. MULTIPLICATION SIGNh]h×}hj sbah }(h ]h ]h"]timesah$]h&]uh1hhhhKNhhhhubh)}(h0.. |trade| unicode:: U+02122 .. TRADE MARK SIGNh]h™}hj sbah }(h ]h ]h"]tradeah$]h&]uh1hhhhKOhhhhubh)}(h... |uarr| unicode:: U+02191 .. UPWARDS ARROWh]h↑}hj sbah }(h ]h ]h"]uarrah$]h&]uh1hhhhKPhhhhubh)}(h... |verbar| unicode:: U+0007C .. VERTICAL LINEh]h|}hj) sbah }(h ]h ]h"]verbarah$]h&]uh1hhhhKQhhhhubh)}(h*.. |yen| unicode:: U+000A5 .. YEN SIGN
h]h¥}hj8 sbah }(h ]h ]h"]yenah$]h&]uh1hhhhKRhhhhubhsection)}(hhh](htitle)}(h Kernel driver dell-smm-hwmonh]h Kernel driver dell-smm-hwmon}(hjN hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hjI hhhhhKubh
field_list)}(hhh](hfield)}(hhh](h
field_name)}(h Copyrighth]h Copyright}(hjh hhhNhNubah }(h ]h ]h"]h$]h&]uh1jf hjc hhhK ubh
field_body)}(h2|copy| 2002-2005 Massimo Dal Zotto h]h paragraph)}(hjz h](h©}(hj~ hhhNhNubh 2002-2005 Massimo Dal Zotto <}(hj~ hhhNhNubh reference)}(h
dz@debian.orgh]h
dz@debian.org}(hj hhhNhNubah }(h ]h ]h"]h$]h&]refurimailto:dz@debian.orguh1j hj~ ubh>}(hj~ hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhjx ubah }(h ]h ]h"]h$]h&]uh1jv hjc ubeh }(h ]h ]h"]h$]h&]uh1ja hhhKhj^ hhubjb )}(hhh](jg )}(h Copyrighth]h Copyright}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jf hj hhhK ubjw )}(h1|copy| 2019 Giovanni Mascellani
h]j} )}(h0|copy| 2019 Giovanni Mascellani h](h©}(hj hhhNhNubh 2019 Giovanni Mascellani <}(hj hhhNhNubj )}(hgio@debian.orgh]hgio@debian.org}(hj hhhNhNubah }(h ]h ]h"]h$]h&]refurimailto:gio@debian.orguh1j hj ubh>}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhK hj ubah }(h ]h ]h"]h$]h&]uh1jv hj ubeh }(h ]h ]h"]h$]h&]uh1ja hhhK hj^ hhubeh }(h ]h ]h"]h$]h&]uh1j\ hjI hhhhhKubjH )}(hhh](jM )}(h Descriptionh]h Description}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhK ubj} )}(hX{ On many Dell laptops the System Management Mode (SMM) BIOS can be
queried for the status of fans and temperature sensors. Userspace
utilities like ``sensors`` can be used to return the readings. The
userspace suite `i8kutils`__ can also be used to read the sensors and
automatically adjust fan speed (please notice that it currently uses
the deprecated ``/proc/i8k`` interface).h](hOn many Dell laptops the System Management Mode (SMM) BIOS can be
queried for the status of fans and temperature sensors. Userspace
utilities like }(hj hhhNhNubhliteral)}(h ``sensors``h]hsensors}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh9 can be used to return the readings. The
userspace suite }(hj hhhNhNubj )}(h `i8kutils`__h]hi8kutils}(hj+ hhhNhNubah }(h ]h ]h"]h$]h&]namei8kutils anonymousKrefuri%https://github.com/vitorafsr/i8kutilsuh1j hj resolvedKubh~ can also be used to read the sensors and
automatically adjust fan speed (please notice that it currently uses
the deprecated }(hj hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hjC hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh interface).}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubh block_quote)}(h)__ https://github.com/vitorafsr/i8kutils
h]htarget)}(h(__ https://github.com/vitorafsr/i8kutilsh]h }(h ]id1ah ]h"]h$]h&]j< j= j; Kuh1ja hKkhj]
referencedKubah }(h ]h ]h"]h$]h&]uh1j[ hhhKhj hhubeh }(h ] descriptionah ]h"] descriptionah$]h&]uh1jG hjI hhhhhK ubjH )}(hhh](jM )}(h``sysfs`` interfaceh](j )}(h ``sysfs``h]hsysfs}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh
interface}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jL hj} hhhhhKubj} )}(hX? Temperature sensors and fans can be queried and set via the standard
``hwmon`` interface on ``sysfs``, under the directory
``/sys/class/hwmon/hwmonX`` for some value of ``X`` (search for the
``X`` such that ``/sys/class/hwmon/hwmonX/name`` has content
``dell_smm``). A number of other attributes can be read or written:h](hETemperature sensors and fans can be queried and set via the standard
}(hj hhhNhNubj )}(h ``hwmon``h]hhwmon}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh interface on }(hj hhhNhNubj )}(h ``sysfs``h]hsysfs}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, under the directory
}(hj hhhNhNubj )}(h``/sys/class/hwmon/hwmonX``h]h/sys/class/hwmon/hwmonX}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh for some value of }(hj hhhNhNubj )}(h``X``h]hX}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh (search for the
}(hj hhhNhNubj )}(h``X``h]hX}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh such that }(hj hhhNhNubj )}(h ``/sys/class/hwmon/hwmonX/name``h]h /sys/class/hwmon/hwmonX/name}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh
has content
}(hj hhhNhNubj )}(h ``dell_smm``h]hdell_smm}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh7). A number of other attributes can be read or written:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj} hhubhtable)}(hhh]htgroup)}(hhh](hcolspec)}(hhh]h }(h ]h ]h"]h$]h&]colwidthK uh1j2 hj/ ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthKuh1j2 hj/ ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthK'uh1j2 hj/ ubhthead)}(hhh]hrow)}(hhh](hentry)}(hhh]j} )}(hNameh]hName}(hja hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK!hj^ ubah }(h ]h ]h"]h$]h&]uh1j\ hjY ubj] )}(hhh]j} )}(hPermh]hPerm}(hjx hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK!hju ubah }(h ]h ]h"]h$]h&]uh1j\ hjY ubj] )}(hhh]j} )}(h Descriptionh]h Description}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK!hj ubah }(h ]h ]h"]h$]h&]uh1j\ hjY ubeh }(h ]h ]h"]h$]h&]uh1jW hjT ubah }(h ]h ]h"]h$]h&]uh1jR hj/ ubhtbody)}(hhh](jX )}(hhh](j] )}(hhh]j} )}(hfan[1-4]_inputh]hfan[1-4]_input}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK#hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hROh]hRO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK#hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hFan speed in RPM.h]hFan speed in RPM.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK#hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hfan[1-4]_labelh]hfan[1-4]_label}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK$hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hROh]hRO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK$hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h
Fan label.h]h
Fan label.}(hj6 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK$hj3 ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h fan[1-4]_minh]h fan[1-4]_min}(hjV hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK%hjS ubah }(h ]h ]h"]h$]h&]uh1j\ hjP ubj] )}(hhh]j} )}(hROh]hRO}(hjm hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK%hjj ubah }(h ]h ]h"]h$]h&]uh1j\ hjP ubj] )}(hhh]j} )}(hMinimal Fan speed in RPMh]hMinimal Fan speed in RPM}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK%hj ubah }(h ]h ]h"]h$]h&]uh1j\ hjP ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h fan[1-4]_maxh]h fan[1-4]_max}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK&hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hROh]hRO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK&hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hMaximal Fan speed in RPMh]hMaximal Fan speed in RPM}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK&hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hfan[1-4]_targeth]hfan[1-4]_target}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK'hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hROh]hRO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK'hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hExpected Fan speed in RPMh]hExpected Fan speed in RPM}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK'hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hpwm[1-4]h]hpwm[1-4]}(hj@ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK(hj= ubah }(h ]h ]h"]h$]h&]uh1j\ hj: ubj] )}(hhh]j} )}(hRWh]hRW}(hjW hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK(hjT ubah }(h ]h ]h"]h$]h&]uh1j\ hj: ubj] )}(hhh]j} )}(h Control the fan PWM duty-cycle.h]h Control the fan PWM duty-cycle.}(hjn hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK(hjk ubah }(h ]h ]h"]h$]h&]uh1j\ hj: ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h pwm1_enableh]h pwm1_enable}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK)hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hWOh]hWO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK)hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hcEnable or disable automatic BIOS fan
control (not supported on all laptops,
see below for details).h]hcEnable or disable automatic BIOS fan
control (not supported on all laptops,
see below for details).}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK)hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(htemp[1-10]_inputh]htemp[1-10]_input}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK,hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hROh]hRO}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK,hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h-Temperature reading in milli-degrees
Celsius.h]h-Temperature reading in milli-degrees
Celsius.}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK,hj
ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(htemp[1-10]_labelh]htemp[1-10]_label}(hj*
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK.hj'
ubah }(h ]h ]h"]h$]h&]uh1j\ hj$
ubj] )}(hhh]j} )}(hROh]hRO}(hjA
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK.hj>
ubah }(h ]h ]h"]h$]h&]uh1j\ hj$
ubj] )}(hhh]j} )}(hTemperature sensor label.h]hTemperature sensor label.}(hjX
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK.hjU
ubah }(h ]h ]h"]h$]h&]uh1j\ hj$
ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubeh }(h ]h ]h"]h$]h&]uh1j hj/ ubeh }(h ]h ]h"]h$]h&]colsKuh1j- hj* ubah }(h ]h ]h"]h$]h&]uh1j( hj} hhhhhNubj} )}(hRDue to the nature of the SMM interface, each pwmX attribute controls
fan number X.h]hRDue to the nature of the SMM interface, each pwmX attribute controls
fan number X.}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK1hj} hhubeh }(h ]sysfs-interfaceah ]h"]sysfs interfaceah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(h$Disabling automatic BIOS fan controlh]h$Disabling automatic BIOS fan control}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj
hhhhhK5ubj} )}(hOn some laptops the BIOS automatically sets fan speed every few
seconds. Therefore the fan speed set by mean of this driver is quickly
overwritten.h]hOn some laptops the BIOS automatically sets fan speed every few
seconds. Therefore the fan speed set by mean of this driver is quickly
overwritten.}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK7hj
hhubj} )}(hX There is experimental support for disabling automatic BIOS fan
control, at least on laptops where the corresponding SMM command is
known, by writing the value ``1`` in the attribute ``pwm1_enable``
(writing ``2`` enables automatic BIOS control again). Even if you have
more than one fan, all of them are set to either enabled or disabled
automatic fan control at the same time and, notwithstanding the name,
``pwm1_enable`` sets automatic control for all fans.h](hThere is experimental support for disabling automatic BIOS fan
control, at least on laptops where the corresponding SMM command is
known, by writing the value }(hj
hhhNhNubj )}(h``1``h]h1}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh in the attribute }(hj
hhhNhNubj )}(h``pwm1_enable``h]h pwm1_enable}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh
(writing }(hj
hhhNhNubj )}(h``2``h]h2}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh enables automatic BIOS control again). Even if you have
more than one fan, all of them are set to either enabled or disabled
automatic fan control at the same time and, notwithstanding the name,
}(hj
hhhNhNubj )}(h``pwm1_enable``h]h pwm1_enable}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh% sets automatic control for all fans.}(hj
hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhK;hj
hhubj} )}(hX If ``pwm1_enable`` is not available, then it means that SMM codes for
enabling and disabling automatic BIOS fan control are not whitelisted
for your hardware. It is possible that codes that work for other
laptops actually work for yours as well, or that you have to discover
new codes.h](hIf }(hj hhhNhNubj )}(h``pwm1_enable``h]h pwm1_enable}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubhX is not available, then it means that SMM codes for
enabling and disabling automatic BIOS fan control are not whitelisted
for your hardware. It is possible that codes that work for other
laptops actually work for yours as well, or that you have to discover
new codes.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKChj
hhubj} )}(hX Check the list ``i8k_whitelist_fan_control`` in file
``drivers/hwmon/dell-smm-hwmon.c`` in the kernel tree: as a first
attempt you can try to add your machine and use an already-known code
pair. If, after recompiling the kernel, you see that ``pwm1_enable``
is present and works (i.e., you can manually control the fan speed),
then please submit your finding as a kernel patch, so that other users
can benefit from it. Please see
:ref:`Documentation/process/submitting-patches.rst `
for information on submitting patches.h](hCheck the list }(hj0 hhhNhNubj )}(h ``i8k_whitelist_fan_control``h]hi8k_whitelist_fan_control}(hj8 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj0 ubh in file
}(hj0 hhhNhNubj )}(h"``drivers/hwmon/dell-smm-hwmon.c``h]h drivers/hwmon/dell-smm-hwmon.c}(hjJ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj0 ubh in the kernel tree: as a first
attempt you can try to add your machine and use an already-known code
pair. If, after recompiling the kernel, you see that }(hj0 hhhNhNubj )}(h``pwm1_enable``h]h pwm1_enable}(hj\ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj0 ubh
is present and works (i.e., you can manually control the fan speed),
then please submit your finding as a kernel patch, so that other users
can benefit from it. Please see
}(hj0 hhhNhNubh)}(hG:ref:`Documentation/process/submitting-patches.rst `h]hinline)}(hjp h]h,Documentation/process/submitting-patches.rst}(hjt hhhNhNubah }(h ]h ](xrefstdstd-refeh"]h$]h&]uh1jr hjn ubah }(h ]h ]h"]h$]h&]refdochwmon/dell-smm-hwmon refdomainj reftyperef refexplicitrefwarn reftargetsubmittingpatchesuh1hhhhKIhj0 ubh'
for information on submitting patches.}(hj0 hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKIhj
hhubj} )}(hX If no known code works on your machine, you need to resort to do some
probing, because unfortunately Dell does not publish datasheets for
its SMM. You can experiment with the code in `this repository`__ to
probe the BIOS on your machine and discover the appropriate codes.h](hIf no known code works on your machine, you need to resort to do some
probing, because unfortunately Dell does not publish datasheets for
its SMM. You can experiment with the code in }(hj hhhNhNubj )}(h`this repository`__h]hthis repository}(hj hhhNhNubah }(h ]h ]h"]h$]h&]namethis repositoryj; Kj< "https://github.com/clopez/dellfan/uh1j hj j> KubhF to
probe the BIOS on your machine and discover the appropriate codes.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKShj
hhubj\ )}(h&__ https://github.com/clopez/dellfan/
h]jb )}(h%__ https://github.com/clopez/dellfan/h]h }(h ]id2ah ]h"]h$]h&]j< j j; Kuh1ja hKhj jn Kubah }(h ]h ]h"]h$]h&]uh1j[ hhhKXhj
hhubj} )}(hCAgain, when you find new codes, we'd be happy to have your patches!h]hEAgain, when you find new codes, we’d be happy to have your patches!}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKZhj
hhubeh }(h ]$disabling-automatic-bios-fan-controlah ]h"]$disabling automatic bios fan controlah$]h&]uh1jG hjI hhhhhK5ubjH )}(hhh](jM )}(h``thermal`` interfaceh](j )}(h ``thermal``h]hthermal}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh
interface}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jL hj hhhhhK]ubj} )}(hThe driver also exports the fans as thermal cooling devices with
``type`` set to ``dell-smm-fan[1-4]``. This allows for easy fan control
using one of the thermal governors.h](hAThe driver also exports the fans as thermal cooling devices with
}(hj
hhhNhNubj )}(h``type``h]htype}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh set to }(hj
hhhNhNubj )}(h``dell-smm-fan[1-4]``h]hdell-smm-fan[1-4]}(hj$ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubhF. This allows for easy fan control
using one of the thermal governors.}(hj
hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhK_hj hhubeh }(h ]thermal-interfaceah ]h"]thermal interfaceah$]h&]uh1jG hjI hhhhhK]ubjH )}(hhh](jM )}(hModule parametersh]hModule parameters}(hjG hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hjD hhhhhKdubh bullet_list)}(hhh](h list_item)}(hoforce:bool
Force loading without checking for supported
models. (default: 0)
h]hdefinition_list)}(hhh]hdefinition_list_item)}(hMforce:bool
Force loading without checking for supported
models. (default: 0)
h](hterm)}(h
force:boolh]h
force:bool}(hjm hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhKhhjg ubh
definition)}(hhh]j} )}(hAForce loading without checking for supported
models. (default: 0)h]hAForce loading without checking for supported
models. (default: 0)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKghj} ubah }(h ]h ]h"]h$]h&]uh1j{ hjg ubeh }(h ]h ]h"]h$]h&]uh1je hhhKhhjb ubah }(h ]h ]h"]h$]h&]uh1j` hj\ ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubj[ )}(hzignore_dmi:bool
Continue probing hardware even if DMI data does not
match. (default: 0)
h]ja )}(hhh]jf )}(hXignore_dmi:bool
Continue probing hardware even if DMI data does not
match. (default: 0)
h](jl )}(hignore_dmi:boolh]hignore_dmi:bool}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhKlhj ubj| )}(hhh]j} )}(hGContinue probing hardware even if DMI data does not
match. (default: 0)h]hGContinue probing hardware even if DMI data does not
match. (default: 0)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKkhj ubah }(h ]h ]h"]h$]h&]uh1j{ hj ubeh }(h ]h ]h"]h$]h&]uh1je hhhKlhj ubah }(h ]h ]h"]h$]h&]uh1j` hj ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubj[ )}(hX= restricted:bool
Allow fan control only to processes with the
``CAP_SYS_ADMIN`` capability set or processes run
as root when using the legacy ``/proc/i8k``
interface. In this case normal users will be able
to read temperature and fan status but not to
control the fan. If your notebook is shared with
other users and you don't trust them you may want
to use this option. (default: 1, only available
with ``CONFIG_I8K``)
h]ja )}(hhh]jf )}(hX restricted:bool
Allow fan control only to processes with the
``CAP_SYS_ADMIN`` capability set or processes run
as root when using the legacy ``/proc/i8k``
interface. In this case normal users will be able
to read temperature and fan status but not to
control the fan. If your notebook is shared with
other users and you don't trust them you may want
to use this option. (default: 1, only available
with ``CONFIG_I8K``)
h](jl )}(hrestricted:boolh]hrestricted:bool}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhKwhj ubj| )}(hhh]j} )}(hX Allow fan control only to processes with the
``CAP_SYS_ADMIN`` capability set or processes run
as root when using the legacy ``/proc/i8k``
interface. In this case normal users will be able
to read temperature and fan status but not to
control the fan. If your notebook is shared with
other users and you don't trust them you may want
to use this option. (default: 1, only available
with ``CONFIG_I8K``)h](h-Allow fan control only to processes with the
}(hj
hhhNhNubj )}(h``CAP_SYS_ADMIN``h]h
CAP_SYS_ADMIN}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh? capability set or processes run
as root when using the legacy }(hj
hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh
interface. In this case normal users will be able
to read temperature and fan status but not to
control the fan. If your notebook is shared with
other users and you don’t trust them you may want
to use this option. (default: 1, only available
with }(hj
hhhNhNubj )}(h``CONFIG_I8K``h]h
CONFIG_I8K}(hj0
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj
ubh)}(hj
hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKohj
ubah }(h ]h ]h"]h$]h&]uh1j{ hj ubeh }(h ]h ]h"]h$]h&]uh1je hhhKwhj ubah }(h ]h ]h"]h$]h&]uh1j` hj ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubj[ )}(hpower_status:bool
Report AC status in ``/proc/i8k``. (default: 0,
only available with ``CONFIG_I8K``)
h]ja )}(hhh]jf )}(hfpower_status:bool
Report AC status in ``/proc/i8k``. (default: 0,
only available with ``CONFIG_I8K``)
h](jl )}(hpower_status:boolh]hpower_status:bool}(hjk
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhK{hjg
ubj| )}(hhh]j} )}(hSReport AC status in ``/proc/i8k``. (default: 0,
only available with ``CONFIG_I8K``)h](hReport AC status in }(hj|
hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj|
ubh#. (default: 0,
only available with }(hj|
hhhNhNubj )}(h``CONFIG_I8K``h]h
CONFIG_I8K}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj|
ubh)}(hj|
hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKzhjy
ubah }(h ]h ]h"]h$]h&]uh1j{ hjg
ubeh }(h ]h ]h"]h$]h&]uh1je hhhK{hjd
ubah }(h ]h ]h"]h$]h&]uh1j` hj`
ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubj[ )}(hifan_mult:uint
Factor to multiply fan speed with. (default:
autodetect)
h]ja )}(hhh]jf )}(hGfan_mult:uint
Factor to multiply fan speed with. (default:
autodetect)
h](jl )}(h
fan_mult:uinth]h
fan_mult:uint}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhKhj
ubj| )}(hhh]j} )}(h8Factor to multiply fan speed with. (default:
autodetect)h]h8Factor to multiply fan speed with. (default:
autodetect)}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhK~hj
ubah }(h ]h ]h"]h$]h&]uh1j{ hj
ubeh }(h ]h ]h"]h$]h&]uh1je hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j` hj
ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubj[ )}(hefan_max:uint
Maximum configurable fan speed. (default:
autodetect)
h]ja )}(hhh]jf )}(hCfan_max:uint
Maximum configurable fan speed. (default:
autodetect)
h](jl )}(h fan_max:uinth]h fan_max:uint}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jk hhhKhj ubj| )}(hhh]j} )}(h5Maximum configurable fan speed. (default:
autodetect)h]h5Maximum configurable fan speed. (default:
autodetect)}(hj$ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj! ubah }(h ]h ]h"]h$]h&]uh1j{ hj ubeh }(h ]h ]h"]h$]h&]uh1je hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j` hj ubah }(h ]h ]h"]h$]h&]uh1jZ hjW hhhNhNubeh }(h ]h ]h"]h$]h&]bullet*uh1jU hhhKfhjD hhubeh }(h ]module-parametersah ]h"]module parametersah$]h&]uh1jG hjI hhhhhKdubjH )}(hhh](jM )}(hLegacy ``/proc`` interfaceh](hLegacy }(hj] hhhNhNubj )}(h ``/proc``h]h/proc}(hje hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj] ubh
interface}(hj] hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jL hjZ hhhhhKubhwarning)}(hThis interface is obsolete and deprecated and should not
used in new applications. This interface is only
available when kernel is compiled with option
``CONFIG_I8K``.h]j} )}(hThis interface is obsolete and deprecated and should not
used in new applications. This interface is only
available when kernel is compiled with option
``CONFIG_I8K``.h](hThis interface is obsolete and deprecated and should not
used in new applications. This interface is only
available when kernel is compiled with option
}(hj hhhNhNubj )}(h``CONFIG_I8K``h]h
CONFIG_I8K}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j} hjZ hhhhhNubj} )}(huThe information provided by the kernel driver can be accessed by
simply reading the ``/proc/i8k`` file. For example::h](hTThe information provided by the kernel driver can be accessed by
simply reading the }(hj hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh file. For example:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhjZ hhubh
literal_block)}(h4$ cat /proc/i8k
1.0 A17 2J59L02 52 2 1 8040 6420 1 2h]h4$ cat /proc/i8k
1.0 A17 2J59L02 52 2 1 8040 6420 1 2}hj sbah }(h ]h ]h"]h$]h&]hhuh1j hhhKhjZ hhubj} )}(h(The fields read from ``/proc/i8k`` are::h](hThe fields read from }(hj hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh are:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhjZ hhubj )}(hX 1.0 A17 2J59L02 52 2 1 8040 6420 1 2
| | | | | | | | | |
| | | | | | | | | +------- 10. buttons status
| | | | | | | | +--------- 9. AC status
| | | | | | | +-------------- 8. fan0 RPM
| | | | | | +------------------- 7. fan1 RPM
| | | | | +--------------------- 6. fan0 status
| | | | +----------------------- 5. fan1 status
| | | +-------------------------- 4. temp0 reading (Celsius)
| | +---------------------------------- 3. Dell service tag (later known as 'serial number')
| +-------------------------------------- 2. BIOS version
+------------------------------------------ 1. /proc/i8k format versionh]hX 1.0 A17 2J59L02 52 2 1 8040 6420 1 2
| | | | | | | | | |
| | | | | | | | | +------- 10. buttons status
| | | | | | | | +--------- 9. AC status
| | | | | | | +-------------- 8. fan0 RPM
| | | | | | +------------------- 7. fan1 RPM
| | | | | +--------------------- 6. fan0 status
| | | | +----------------------- 5. fan1 status
| | | +-------------------------- 4. temp0 reading (Celsius)
| | +---------------------------------- 3. Dell service tag (later known as 'serial number')
| +-------------------------------------- 2. BIOS version
+------------------------------------------ 1. /proc/i8k format version}hj sbah }(h ]h ]h"]h$]h&]hhuh1j hhhKhjZ hhubj} )}(hA negative value, for example -22, indicates that the BIOS doesn't
return the corresponding information. This is normal on some
models/BIOSes.h]hA negative value, for example -22, indicates that the BIOS doesn’t
return the corresponding information. This is normal on some
models/BIOSes.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjZ hhubj} )}(hXc For performance reasons the ``/proc/i8k`` doesn't report by default
the AC status since this SMM call takes a long time to execute and is
not really needed. If you want to see the ac status in ``/proc/i8k``
you must explictitly enable this option by passing the
``power_status=1`` parameter to insmod. If AC status is not
available -1 is printed instead.h](h For performance reasons the }(hj hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh doesn’t report by default
the AC status since this SMM call takes a long time to execute and is
not really needed. If you want to see the ac status in }(hj hhhNhNubj )}(h
``/proc/i8k``h]h /proc/i8k}(hj/ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh8
you must explictitly enable this option by passing the
}(hj hhhNhNubj )}(h``power_status=1``h]hpower_status=1}(hjA hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubhJ parameter to insmod. If AC status is not
available -1 is printed instead.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhjZ hhubj} )}(hX3 The driver provides also an ioctl interface which can be used to
obtain the same information and to control the fan status. The ioctl
interface can be accessed from C programs or from shell using the
i8kctl utility. See the source file of ``i8kutils`` for more
information on how to use the ioctl interface.h](hThe driver provides also an ioctl interface which can be used to
obtain the same information and to control the fan status. The ioctl
interface can be accessed from C programs or from shell using the
i8kctl utility. See the source file of }(hjY hhhNhNubj )}(h ``i8kutils``h]hi8kutils}(hja hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjY ubh8 for more
information on how to use the ioctl interface.}(hjY hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhjZ hhubeh }(h ]legacy-proc-interfaceah ]h"]legacy /proc interfaceah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(h
SMM Interfaceh]h
SMM Interface}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhKubj~ )}(hThe SMM interface was reverse-engineered by trial-and-error
since Dell did not provide any Documentation,
please keep that in mind.h]j} )}(hThe SMM interface was reverse-engineered by trial-and-error
since Dell did not provide any Documentation,
please keep that in mind.h]hThe SMM interface was reverse-engineered by trial-and-error
since Dell did not provide any Documentation,
please keep that in mind.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j} hj hhhhhNubj} )}(hX The driver uses the SMM interface to send commands to the system BIOS.
This interface is normally used by Dell's 32-bit diagnostic program or
on newer notebook models by the buildin BIOS diagnostics.
The SMM may cause short hangs when the BIOS code is taking too long to
execute.h]hX The driver uses the SMM interface to send commands to the system BIOS.
This interface is normally used by Dell’s 32-bit diagnostic program or
on newer notebook models by the buildin BIOS diagnostics.
The SMM may cause short hangs when the BIOS code is taking too long to
execute.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubj} )}(hThe SMM handler inside the system BIOS looks at the contents of the
``eax``, ``ebx``, ``ecx``, ``edx``, ``esi`` and ``edi`` registers.
Each register has a special purpose:h](hDThe SMM handler inside the system BIOS looks at the contents of the
}(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, }hj sbj )}(h``ecx``h]hecx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, }hj sbj )}(h``edx``h]hedx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, }hj sbj )}(h``esi``h]hesi}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh and }(hj hhhNhNubj )}(h``edi``h]hedi}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh0 registers.
Each register has a special purpose:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubj) )}(hhh]j. )}(hhh](j3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthKuh1j2 hj5 ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthK"uh1j2 hj5 ubjS )}(hhh]jX )}(hhh](j] )}(hhh]j} )}(hRegisterh]hRegister}(hjU hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjR ubah }(h ]h ]h"]h$]h&]uh1j\ hjO ubj] )}(hhh]j} )}(hPurposeh]hPurpose}(hjl hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhji ubah }(h ]h ]h"]h$]h&]uh1j\ hjO ubeh }(h ]h ]h"]h$]h&]uh1jW hjL ubah }(h ]h ]h"]h$]h&]uh1jR hj5 ubj )}(hhh](jX )}(hhh](j] )}(hhh]j} )}(heaxh]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hDHolds the command code before SMM,
holds the first result after SMM.h]hDHolds the command code before SMM,
holds the first result after SMM.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hebxh]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hHolds the arguments.h]hHolds the arguments.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hecxh]hecx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hUnknown, set to 0.h]hUnknown, set to 0.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hedxh]hedx}(hj: hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj7 ubah }(h ]h ]h"]h$]h&]uh1j\ hj4 ubj] )}(hhh]j} )}(h"Holds the second result after SMM.h]h"Holds the second result after SMM.}(hjQ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjN ubah }(h ]h ]h"]h$]h&]uh1j\ hj4 ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hesih]hesi}(hjq hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjn ubah }(h ]h ]h"]h$]h&]uh1j\ hjk ubj] )}(hhh]j} )}(hUnknown, set to 0.h]hUnknown, set to 0.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hjk ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(hedih]hedi}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hUnknown, set to 0.h]hUnknown, set to 0.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubeh }(h ]h ]h"]h$]h&]uh1j hj5 ubeh }(h ]h ]h"]h$]h&]colsKuh1j- hj2 ubah }(h ]h ]h"]h$]h&]uh1j( hj hhhhhNubj} )}(h/The SMM handler can signal a failure by either:h]h/The SMM handler can signal a failure by either:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubjV )}(hhh](j[ )}(h7setting the lower sixteen bits of ``eax`` to ``0xffff``h]j} )}(hj h](h"setting the lower sixteen bits of }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh to }(hj hhhNhNubj )}(h
``0xffff``h]h0xffff}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj hhhhhNubj[ )}(h not modifying ``eax`` at allh]j} )}(hj6 h](hnot modifying }(hj8 hhhNhNubj )}(h``eax``h]heax}(hj? hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj8 ubh at all}(hj8 hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj4 ubah }(h ]h ]h"]h$]h&]uh1jZ hj hhhhhNubj[ )}(h3setting the carry flag (legacy SMM interface only)
h]j} )}(h2setting the carry flag (legacy SMM interface only)h]h2setting the carry flag (legacy SMM interface only)}(hja hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj] ubah }(h ]h ]h"]h$]h&]uh1jZ hj hhhhhNubeh }(h ]h ]h"]h$]h&]jP -uh1jU hhhKhj hhubeh }(h ]
smm-interfaceah ]h"]
smm interfaceah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(hLegacy SMM Interfaceh]hLegacy SMM Interface}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhKubj} )}(hX When using the legacy SMM interface, a SMM is triggered by writing the least significant byte
of the command code to the special ioports ``0xb2`` and ``0x84``. This interface is not
described inside the ACPI tables and can thus only be detected by issuing a test SMM call.h](hWhen using the legacy SMM interface, a SMM is triggered by writing the least significant byte
of the command code to the special ioports }(hj hhhNhNubj )}(h``0xb2``h]h0xb2}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh and }(hj hhhNhNubj )}(h``0x84``h]h0x84}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubhr. This interface is not
described inside the ACPI tables and can thus only be detected by issuing a test SMM call.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubeh }(h ]legacy-smm-interfaceah ]h"]legacy smm interfaceah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(hWMI SMM Interfaceh]hWMI SMM Interface}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhKubj} )}(h>On modern Dell machines, the SMM calls are done over ACPI WMI:h]h>On modern Dell machines, the SMM calls are done over ACPI WMI:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubj )}(hX #pragma namespace("\\\\.\\root\\dcim\\sysman\\diagnostics")
[WMI, Provider("Provider_DiagnosticsServices"), Dynamic, Locale("MS\\0x409"),
Description("RunDellDiag"), guid("{F1DDEE52-063C-4784-A11E-8A06684B9B01}")]
class LegacyDiags {
[key, read] string InstanceName;
[read] boolean Active;
[WmiMethodId(1), Implemented, read, write, Description("Legacy Method ")]
void Execute([in, out] uint32 EaxLen, [in, out, WmiSizeIs("EaxLen") : ToInstance] uint8 EaxVal[],
[in, out] uint32 EbxLen, [in, out, WmiSizeIs("EbxLen") : ToInstance] uint8 EbxVal[],
[in, out] uint32 EcxLen, [in, out, WmiSizeIs("EcxLen") : ToInstance] uint8 EcxVal[],
[in, out] uint32 EdxLen, [in, out, WmiSizeIs("EdxLen") : ToInstance] uint8 EdxVal[]);
};h]hX #pragma namespace("\\\\.\\root\\dcim\\sysman\\diagnostics")
[WMI, Provider("Provider_DiagnosticsServices"), Dynamic, Locale("MS\\0x409"),
Description("RunDellDiag"), guid("{F1DDEE52-063C-4784-A11E-8A06684B9B01}")]
class LegacyDiags {
[key, read] string InstanceName;
[read] boolean Active;
[WmiMethodId(1), Implemented, read, write, Description("Legacy Method ")]
void Execute([in, out] uint32 EaxLen, [in, out, WmiSizeIs("EaxLen") : ToInstance] uint8 EaxVal[],
[in, out] uint32 EbxLen, [in, out, WmiSizeIs("EbxLen") : ToInstance] uint8 EbxVal[],
[in, out] uint32 EcxLen, [in, out, WmiSizeIs("EcxLen") : ToInstance] uint8 EcxVal[],
[in, out] uint32 EdxLen, [in, out, WmiSizeIs("EdxLen") : ToInstance] uint8 EdxVal[]);
};}hj sbah }(h ]h ]h"]h$]h&]hhuh1j hhhKhj hhubj} )}(hXq Some machines support only the WMI SMM interface, while some machines support both interfaces.
The driver automatically detects which interfaces are present and will use the WMI SMM interface
if the legacy SMM interface is not present. The WMI SMM interface is usually slower than the
legacy SMM interface since ACPI methods need to be called in order to trigger a SMM.h]hXq Some machines support only the WMI SMM interface, while some machines support both interfaces.
The driver automatically detects which interfaces are present and will use the WMI SMM interface
if the legacy SMM interface is not present. The WMI SMM interface is usually slower than the
legacy SMM interface since ACPI methods need to be called in order to trigger a SMM.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj hhubeh }(h ]wmi-smm-interfaceah ]h"]wmi smm interfaceah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(hSMM command codesh]hSMM command codes}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhKubj) )}(hhh]j. )}(hhh](j3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthKuh1j2 hj& ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthKuh1j2 hj& ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthK0uh1j2 hj& ubjS )}(hhh]jX )}(hhh](j] )}(hhh]j} )}(h Command Codeh]h Command Code}(hjP hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjM ubah }(h ]h ]h"]h$]h&]uh1j\ hjJ ubj] )}(hhh]j} )}(h Command Nameh]h Command Name}(hjg hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhjd ubah }(h ]h ]h"]h$]h&]uh1j\ hjJ ubj] )}(hhh]j} )}(h Descriptionh]h Description}(hj~ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj{ ubah }(h ]h ]h"]h$]h&]uh1j\ hjJ ubeh }(h ]h ]h"]h$]h&]uh1jW hjG ubah }(h ]h ]h"]h$]h&]uh1jR hj& ubj )}(hhh](jX )}(hhh](j] )}(hhh]j} )}(h
``0x0025``h]j )}(hj h]h0x0025}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hGet Fn key statush]hGet Fn key status}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(h%Returns the Fn key pressed after SMM:h]h%Returns the Fn key pressed after SMM:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubjV )}(hhh](j[ )}(h&9th bit in ``eax`` indicates Volume uph]j} )}(hj h](h 9th bit in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh indicates Volume up}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhKhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h)10th bit in ``eax`` indicates Volume downh]j} )}(hj h](h 10th bit in }(hj hhhNhNubj )}(h``eax``h]heax}(hj# hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh indicates Volume down}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h both bits indicate Volume mute
h]j} )}(h both bits indicate Volume muteh]h both bits indicate Volume mute}(hjE hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhjA ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhKhj ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0xa069``h]j )}(hjs h]h0xa069}(hju hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjq ubah }(h ]h ]h"]h$]h&]uh1j| hhhMhjn ubah }(h ]h ]h"]h$]h&]uh1j\ hjk ubj] )}(hhh]j} )}(hGet power statush]hGet power status}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1j\ hjk ubj] )}(hhh](j} )}(h'Returns current power status after SMM:h]h'Returns current power status after SMM:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubjV )}(hhh](j[ )}(h.1st bit in ``eax`` indicates Battery connectedh]j} )}(hj h](h 1st bit in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh indicates Battery connected}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h*3th bit in ``eax`` indicates AC connected
h]j} )}(h)3th bit in ``eax`` indicates AC connectedh](h 3th bit in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh indicates AC connected}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMhj ubeh }(h ]h ]h"]h$]h&]uh1j\ hjk ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x00a3``h]j )}(hj& h]h0x00a3}(hj( hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj$ ubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj! ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h
Get fan stateh]h
Get fan state}(hjD hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhjA ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(h$Returns current fan state after SMM:h]h$Returns current fan state after SMM:}(hj[ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhjX ubjV )}(hhh]j[ )}(h=1st byte in ``eax`` holds the current
fan state (0 - 2 or 3)
h]j} )}(h<1st byte in ``eax`` holds the current
fan state (0 - 2 or 3)h](h 1st byte in }(hjp hhhNhNubj )}(h``eax``h]heax}(hjx hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjp ubh) holds the current
fan state (0 - 2 or 3)}(hjp hhhNhNubeh }(h ]w h ]h"]h$]h&]uh1j| hhhM
hjl ubah }(h ]h ]h"]h$]h&]uh1jZ hji ubah }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM
hjX ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x01a3``h]j )}(hj h]h0x01a3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]uh1j| hhhM
hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h
Set fan stateh]h
Set fan state}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM
hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(hSets the fan speed:h]hSets the fan speed:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM
hj ubjV )}(hhh](j[ )}(h(1st byte in ``ebx`` holds the fan numberh]j} )}(hj h](h 1st byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh holds the fan number}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h=2nd byte in ``ebx`` holds the desired
fan state (0 - 2 or 3)
h]j} )}(h<2nd byte in ``ebx`` holds the desired
fan state (0 - 2 or 3)h](h 2nd byte in }(hj# hhhNhNubj )}(h``ebx``h]hebx}(hj+ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj# ubh) holds the desired
fan state (0 - 2 or 3)}(hj# hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMhj ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x02a3``h]j )}(hjc h]h0x02a3}(hje hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hja ubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj^ ubah }(h ]h ]h"]h$]h&]uh1j\ hj[ ubj] )}(hhh]j} )}(h
Get fan speedh]h
Get fan speed}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj~ ubah }(h ]h ]h"]h$]h&]uh1j\ hj[ ubj] )}(hhh](j} )}(h%Returns the current fan speed in RPM:h]h%Returns the current fan speed in RPM:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubjV )}(hhh](j[ )}(h(1st byte in ``ebx`` holds the fan numberh]j} )}(hj h](h 1st byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh holds the fan number}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(hC1st word in ``eax`` holds the current
fan speed in RPM (after SMM)
h]j} )}(hB1st word in ``eax`` holds the current
fan speed in RPM (after SMM)h](h 1st word in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh/ holds the current
fan speed in RPM (after SMM)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMhj ubeh }(h ]h ]h"]h$]h&]uh1j\ hj[ ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x03a3``h]j )}(hj h]h0x03a3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h Get fan typeh]h Get fan type}(hj4 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj1 ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(hReturns the fan type:h]hReturns the fan type:}(hjK hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhjH ubjV )}(hhh](j[ )}(h(1st byte in ``ebx`` holds the fan numberh]j} )}(hj^ h](h 1st byte in }(hj` hhhNhNubj )}(h``ebx``h]hebx}(hjg hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj` ubh holds the fan number}(hj` hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMhj\ ubah }(h ]h ]h"]h$]h&]uh1jZ hjY ubj[ )}(h1st byte in ``eax`` holds the
fan type (after SMM):
- 5th bit indicates docking fan
- 1 indicates Processor fan
- 2 indicates Motherboard fan
- 3 indicates Video fan
- 4 indicates Power supply fan
- 5 indicates Chipset fan
- 6 indicates other fan type
h](j} )}(h31st byte in ``eax`` holds the
fan type (after SMM):h](h 1st byte in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh holds the
fan type (after SMM):}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM hj ubjV )}(hhh](j[ )}(h 5th bit indicates docking fanh]j} )}(hj h]h 5th bit indicates docking fan}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h1 indicates Processor fanh]j} )}(hj h]h1 indicates Processor fan}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h2 indicates Motherboard fanh]j} )}(hj h]h2 indicates Motherboard fan}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM!hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h3 indicates Video fanh]j} )}(hj h]h3 indicates Video fan}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM"hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h 4 indicates Power supply fanh]j} )}(hj
h]h 4 indicates Power supply fan}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM#hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h5 indicates Chipset fanh]j} )}(hj! h]h5 indicates Chipset fan}(hj# hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM$hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h6 indicates other fan type
h]j} )}(h6 indicates other fan typeh]h6 indicates other fan type}(hj: hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM%hj6 ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM hj ubeh }(h ]h ]h"]h$]h&]uh1jZ hjY ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMhjH ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x04a3``h]j )}(hjt h]h0x04a3}(hjv hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjr ubah }(h ]h ]h"]h$]h&]uh1j| hhhM'hjo ubah }(h ]h ]h"]h$]h&]uh1j\ hjl ubj] )}(hhh]j} )}(hGet nominal fan speedh]hGet nominal fan speed}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM'hj ubah }(h ]h ]h"]h$]h&]uh1j\ hjl ubj] )}(hhh](j} )}(h*Returns the nominal RPM in each fan state:h]h*Returns the nominal RPM in each fan state:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM'hj ubjV )}(hhh](j[ )}(h(1st byte in ``ebx`` holds the fan numberh]j} )}(hj h](h 1st byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh holds the fan number}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM)hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h@2nd byte in ``ebx`` holds the fan state
in question (0 - 2 or 3)h]j} )}(h@2nd byte in ``ebx`` holds the fan state
in question (0 - 2 or 3)h](h 2nd byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh- holds the fan state
in question (0 - 2 or 3)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM*hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(hC1st word in ``eax`` holds the nominal
fan speed in RPM (after SMM)
h]j} )}(hB1st word in ``eax`` holds the nominal
fan speed in RPM (after SMM)h](h 1st word in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh/ holds the nominal
fan speed in RPM (after SMM)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM,hj
ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM)hj ubeh }(h ]h ]h"]h$]h&]uh1j\ hjl ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x05a3``h]j )}(hjQ h]h0x05a3}(hjS hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjO ubah }(h ]h ]h"]h$]h&]uh1j| hhhM/hjL ubah }(h ]h ]h"]h$]h&]uh1j\ hjI ubj] )}(hhh]j} )}(hGet fan speed toleranceh]hGet fan speed tolerance}(hjo hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM/hjl ubah }(h ]h ]h"]h$]h&]uh1j\ hjI ubj] )}(hhh](j} )}(h/Returns the speed tolerance for each fan state:h]h/Returns the speed tolerance for each fan state:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM/hj ubjV )}(hhh](j[ )}(h(1st byte in ``ebx`` holds the fan numberh]j} )}(hj h](h 1st byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh holds the fan number}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM1hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h@2nd byte in ``ebx`` holds the fan state
in question (0 - 2 or 3)h]j} )}(h@2nd byte in ``ebx`` holds the fan state
in question (0 - 2 or 3)h](h 2nd byte in }(hj hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh- holds the fan state
in question (0 - 2 or 3)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM2hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubj[ )}(h01st byte in ``eax`` returns the speed
tolerance
h]j} )}(h/1st byte in ``eax`` returns the speed
toleranceh](h 1st byte in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh returns the speed
tolerance}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM4hj ubah }(h ]h ]h"]h$]h&]uh1jZ hj ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM1hj ubeh }(h ]h ]h"]h$]h&]uh1j\ hjI ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x10a3``h]j )}(hj. h]h0x10a3}(hj0 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj, ubah }(h ]h ]h"]h$]h&]uh1j| hhhM7hj) ubah }(h ]h ]h"]h$]h&]uh1j\ hj& ubj] )}(hhh]j} )}(hGet sensor temperatureh]hGet sensor temperature}(hjL hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM7hjI ubah }(h ]h ]h"]h$]h&]uh1j\ hj& ubj] )}(hhh](j} )}(h!Returns the measured temperature:h]h!Returns the measured temperature:}(hjc hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM7hj` ubjV )}(hhh](j[ )}(h+1st byte in ``ebx`` holds the sensor numberh]j} )}(hjv h](h 1st byte in }(hjx hhhNhNubj )}(h``ebx``h]hebx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjx ubh holds the sensor number}(hjx hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM9hjt ubah }(h ]h ]h"]h$]h&]uh1jZ hjq ubj[ )}(h?1st byte in ``eax`` holds the measured
temperature (after SMM)
h]j} )}(h>1st byte in ``eax`` holds the measured
temperature (after SMM)h](h 1st byte in }(hj hhhNhNubj )}(h``eax``h]heax}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh+ holds the measured
temperature (after SMM)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM:hj ubah }(h ]h ]h"]h$]h&]uh1jZ hjq ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM9hj` ubeh }(h ]h ]h"]h$]h&]uh1j\ hj& ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0x11a3``h]j )}(hj h]h0x11a3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]uh1j| hhhM=hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hGet sensor typeh]hGet sensor type}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM=hj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(hReturns the sensor type:h]hReturns the sensor type:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM=hj ubjV )}(hhh](j[ )}(h+1st byte in ``ebx`` holds the sensor numberh]j} )}(hj) h](h 1st byte in }(hj+ hhhNhNubj )}(h``ebx``h]hebx}(hj2 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj+ ubh holds the sensor number}(hj+ hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM?hj' ubah }(h ]h ]h"]h$]h&]uh1jZ hj$ ubj[ )}(h1st byte in ``eax`` holds the
temperature type (after SMM):
- 1 indicates CPU sensor
- 2 indicates GPU sensor
- 3 indicates SODIMM sensor
- 4 indicates other sensor type
- 5 indicates Ambient sensor
- 6 indicates other sensor type
h](j} )}(h;1st byte in ``eax`` holds the
temperature type (after SMM):h](h 1st byte in }(hjT hhhNhNubj )}(h``eax``h]heax}(hj\ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjT ubh( holds the
temperature type (after SMM):}(hjT hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhM@hjP ubjV )}(hhh](j[ )}(h1 indicates CPU sensorh]j} )}(hjy h]h1 indicates CPU sensor}(hj{ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMChjw ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubj[ )}(h2 indicates GPU sensorh]j} )}(hj h]h2 indicates GPU sensor}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMDhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubj[ )}(h3 indicates SODIMM sensorh]j} )}(hj h]h3 indicates SODIMM sensor}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMEhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubj[ )}(h 4 indicates other sensor typeh]j} )}(hj h]h 4 indicates other sensor type}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMFhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubj[ )}(h5 indicates Ambient sensorh]j} )}(hj h]h5 indicates Ambient sensor}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMGhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubj[ )}(h 6 indicates other sensor type
h]j} )}(h 6 indicates other sensor typeh]h 6 indicates other sensor type}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMHhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjt ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMChjP ubeh }(h ]h ]h"]h$]h&]uh1jZ hj$ ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhM?hj ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0xfea3``h]j )}(hj( h]h0xfea3}(hj* hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj& ubah }(h ]h ]h"]h$]h&]uh1j| hhhMJhj# ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hGet SMM signatureh]hGet SMM signature}(hjF hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMJhjC ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(h=Returns Dell signature if interface
is supported (after SMM):h]h=Returns Dell signature if interface
is supported (after SMM):}(hj] hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMJhjZ ubjV )}(hhh](j[ )}(h/``eax`` holds 1145651527
(0x44494147 or "DIAG")h]j} )}(h/``eax`` holds 1145651527
(0x44494147 or "DIAG")h](j )}(h``eax``h]heax}(hjv hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjr ubh, holds 1145651527
(0x44494147 or “DIAG”)}(hjr hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMMhjn ubah }(h ]h ]h"]h$]h&]uh1jZ hjk ubj[ )}(h0``edx`` holds 1145392204
(0x44454c4c or "DELL")
h]j} )}(h/``edx`` holds 1145392204
(0x44454c4c or "DELL")h](j )}(h``edx``h]hedx}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh, holds 1145392204
(0x44454c4c or “DELL”)}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMOhj ubah }(h ]h ]h"]h$]h&]uh1jZ hjk ubeh }(h ]h ]h"]h$]h&]jP j{ uh1jU hhhMMhjZ ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubjX )}(hhh](j] )}(hhh]j} )}(h
``0xffa3``h]j )}(hj h]h0xffa3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]uh1j| hhhMRhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hGet SMM signatureh]hGet SMM signature}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMRhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(h Same as ``0xfea3``, check both.h](hSame as }(hj hhhNhNubj )}(h
``0xfea3``h]h0xfea3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh
, check both.}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMRhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubeh }(h ]h ]h"]h$]h&]uh1j hj& ubeh }(h ]h ]h"]h$]h&]colsKuh1j- hj# ubah }(h ]h ]h"]h$]h&]uh1j( hj hhhhhNubj} )}(hThere are additional commands for enabling (``0x31a3`` or ``0x35a3``) and
disabling (``0x30a3`` or ``0x34a3``) automatic fan speed control.
The commands are however causing severe sideeffects on many machines, so
they are not used by default.h](h,There are additional commands for enabling (}(hjH hhhNhNubj )}(h
``0x31a3``h]h0x31a3}(hjP hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjH ubh or }(hjH hhhNhNubj )}(h
``0x35a3``h]h0x35a3}(hjb hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjH ubh) and
disabling (}(hjH hhhNhNubj )}(h
``0x30a3``h]h0x30a3}(hjt hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjH ubh or }hjH sbj )}(h
``0x34a3``h]h0x34a3}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjH ubh) automatic fan speed control.
The commands are however causing severe sideeffects on many machines, so
they are not used by default.}(hjH hhhNhNubeh }(h ]h ]h"]h$]h&]uh1j| hhhMUhj hhubj} )}(hX On several machines (Inspiron 3505, Precision 490, Vostro 1720, ...), the
fans supports a 4th "magic" state, which signals the BIOS that automatic
fan control should be enabled for a specific fan.
However there are also some machines who do support a 4th regular fan state too,
but in case of the "magic" state, the nominal RPM reported for this state is a
placeholder value, which however is not always detectable.h]hX On several machines (Inspiron 3505, Precision 490, Vostro 1720, ...), the
fans supports a 4th “magic” state, which signals the BIOS that automatic
fan control should be enabled for a specific fan.
However there are also some machines who do support a 4th regular fan state too,
but in case of the “magic” state, the nominal RPM reported for this state is a
placeholder value, which however is not always detectable.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMZhj hhubeh }(h ]smm-command-codesah ]h"]smm command codesah$]h&]uh1jG hjI hhhhhKubjH )}(hhh](jM )}(h
Firmware Bugsh]h
Firmware Bugs}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj hhhhhMbubj} )}(h2The SMM calls can behave erratic on some machines:h]h2The SMM calls can behave erratic on some machines:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMdhj hhubj) )}(hhh]j. )}(hhh](j3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthK7uh1j2 hj ubj3 )}(hhh]h }(h ]h ]h"]h$]h&]colwidthKuh1j2 hj ubjS )}(hhh]jX )}(hhh](j] )}(hhh]j} )}(h Firmware Bugh]h Firmware Bug}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMghj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh]j} )}(hAffected Machinesh]hAffected Machines}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMghj
ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj ubah }(h ]h ]h"]h$]h&]uh1jR hj ubj )}(hhh](jX )}(hhh](j] )}(hhh]j} )}(h-Reading of fan states return spurious errors.h]h-Reading of fan states return spurious errors.}(hj6 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMihj3 ubah }(h ]h ]h"]h$]h&]uh1j\ hj0 ubj] )}(hhh](j} )}(h
Precision 490h]h
Precision 490}(hjM hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMihjJ ubj} )}(h
OptiPlex 7060h]h
OptiPlex 7060}(hj[ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMkhjJ ubeh }(h ]h ]h"]h$]h&]uh1j\ hj0 ubeh }(h ]h ]h"]h$]h&]uh1jW hj- ubjX )}(hhh](j] )}(hhh]j} )}(h2Reading of fan types causes erratic fan behaviour.h]h2Reading of fan types causes erratic fan behaviour.}(hj{ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMmhjx ubah }(h ]h ]h"]h$]h&]uh1j\ hju ubj] )}(hhh](j} )}(hStudio XPS 8000h]hStudio XPS 8000}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMmhj ubj} )}(hStudio XPS 8100h]hStudio XPS 8100}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMohj ubj} )}(h Inspiron 580h]h Inspiron 580}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMqhj ubj} )}(h
Inspiron 3505h]h
Inspiron 3505}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMshj ubeh }(h ]h ]h"]h$]h&]uh1j\ hju ubeh }(h ]h ]h"]h$]h&]uh1jW hj- ubjX )}(hhh](j] )}(hhh]j} )}(h2Fan-related SMM calls take too long (about 500ms).h]h2Fan-related SMM calls take too long (about 500ms).}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMuhj ubah }(h ]h ]h"]h$]h&]uh1j\ hj ubj] )}(hhh](j} )}(h
Inspiron 7720h]h
Inspiron 7720}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMuhj ubj} )}(h Vostro 3360h]h Vostro 3360}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMwhj ubj} )}(h XPS 13 9333h]h XPS 13 9333}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMyhj ubj} )}(h XPS 15 L502Xh]h XPS 15 L502X}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM{hj ubeh }(h ]h ]h"]h$]h&]uh1j\ hj ubeh }(h ]h ]h"]h$]h&]uh1jW hj- ubeh }(h ]h ]h"]h$]h&]uh1j hj ubeh }(h ]h ]h"]h$]h&]colsKuh1j- hj ubah }(h ]h ]h"]h$]h&]uh1j( hj hhhhhNubj} )}(h~In case you experience similar issues on your Dell machine, please
submit a bugreport on bugzilla to we can apply workarounds.h]h~In case you experience similar issues on your Dell machine, please
submit a bugreport on bugzilla to we can apply workarounds.}(hjJ hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhM~hj hhubeh }(h ]
firmware-bugsah ]h"]
firmware bugsah$]h&]uh1jG hjI hhhhhMbubjH )}(hhh](jM )}(h Limitationsh]h Limitations}(hjc hhhNhNubah }(h ]h ]h"]h$]h&]uh1jL hj` hhhhhMubj} )}(hX6 The SMM calls can take too long to execute on some machines, causing
short hangs and/or audio glitches.
Also the fan state needs to be restored after suspend, as well as
the automatic mode settings.
When reading a temperature sensor, values above 127 degrees indicate
a BIOS read error or a deactivated sensor.h]hX6 The SMM calls can take too long to execute on some machines, causing
short hangs and/or audio glitches.
Also the fan state needs to be restored after suspend, as well as
the automatic mode settings.
When reading a temperature sensor, values above 127 degrees indicate
a BIOS read error or a deactivated sensor.}(hjq hhhNhNubah }(h ]h ]h"]h$]h&]uh1j| hhhMhj` hhubeh }(h ] limitationsah ]h"] limitationsah$]h&]uh1jG hjI hhhhhMubeh }(h ] kernel-driver-dell-smm-hwmonah ]h"] kernel driver dell-smm-hwmonah$]h&]uh1jG hhhhhhhKubeh }(h ]h ]h"]h$]h&]sourcehuh1hcurrent_sourceN current_lineNsettingsdocutils.frontendValues)}(jL N generatorN datestampN source_linkN
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