€•æ+Œsphinx.addnodes”Œdocument”“”)”}”(Œ rawsource”Œ”Œchildren”]”(Œ translations”Œ LanguagesNode”“”)”}”(hhh]”(hŒ pending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ refdomain”Œstd”Œreftype”Œdoc”Œ reftarget”Œ//translations/zh_CN/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuŒtagname”hhh ubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/zh_TW/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/it_IT/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/ja_JP/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/ko_KR/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒPortuguese (Brazilian)”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/pt_BR/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubh)”}”(hhh]”hŒSpanish”…””}”hh–sbah}”(h]”h ]”h"]”h$]”h&]”Œ refdomain”h)Œreftype”h+Œ reftarget”Œ//translations/sp_SP/admin-guide/braille-console”Œmodname”NŒ classname”NŒ refexplicit”ˆuh1hhh ubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h hhŒ _document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒLinux Braille Console”h]”hŒLinux Braille Console”…””}”(hh¼h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhh·h²hh³ŒI/var/lib/git/docbuild/linux/Documentation/admin-guide/braille-console.rst”h´KubhŒ paragraph”“”)”}”(hX_To get early boot messages on a braille device (before userspace screen readers can start), you first need to compile the support for the usual serial console (see :ref:`Documentation/admin-guide/serial-console.rst `), and for braille device (in :menuselection:`Device Drivers --> Accessibility support --> Console on braille device`).”h]”(hŒ¤To get early boot messages on a braille device (before userspace screen readers can start), you first need to compile the support for the usual serial console (see ”…””}”(hhÍh²hh³Nh´Nubh)”}”(hŒD:ref:`Documentation/admin-guide/serial-console.rst `”h]”hŒinline”“”)”}”(hh×h]”hŒ,Documentation/admin-guide/serial-console.rst”…””}”(hhÛh²hh³Nh´Nubah}”(h]”h ]”(Œxref”Œstd”Œstd-ref”eh"]”h$]”h&]”uh1hÙhhÕubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”Œadmin-guide/braille-console”Œ refdomain”hæŒreftype”Œref”Œ refexplicit”ˆŒrefwarn”ˆŒ reftarget”Œserial_console”uh1hh³hÊh´KhhÍubhŒ), and for braille device (in ”…””}”(hhÍh²hh³Nh´NubhÚ)”}”(hŒFDevice Drivers ‣ Accessibility support ‣ Console on braille device”h]”hŒFDevice Drivers ‣ Accessibility support ‣ Console on braille device”…””}”(hhþh²hh³Nh´Nubah}”(h]”h ]”Œ menuselection”ah"]”h$]”h&]”Œrawtext”ŒW:menuselection:`Device Drivers --> Accessibility support --> Console on braille device`”uh1hÙhhÍubhŒ).”…””}”(hhÍh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒ^Then you need to specify a ``console=brl``, option on the kernel command line, the format is::”h]”(hŒThen you need to specify a ”…””}”(hjh²hh³Nh´NubhŒliteral”“”)”}”(hŒ``console=brl``”h]”hŒ console=brl”…””}”(hj#h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hjubhŒ3, option on the kernel command line, the format is:”…””}”(hjh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K hh·h²hubhŒ literal_block”“”)”}”(hŒconsole=brl,serial_options...”h]”hŒconsole=brl,serial_options...”…””}”hj=sbah}”(h]”h ]”h"]”h$]”h&]”Œ xml:space”Œpreserve”uh1j;h³hÊh´K hh·h²hubhÌ)”}”(hŒ~where ``serial_options...`` are the same as described in :ref:`Documentation/admin-guide/serial-console.rst `.”h]”(hŒwhere ”…””}”(hjMh²hh³Nh´Nubj")”}”(hŒ``serial_options...``”h]”hŒserial_options...”…””}”(hjUh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hjMubhŒ are the same as described in ”…””}”(hjMh²hh³Nh´Nubh)”}”(hŒD:ref:`Documentation/admin-guide/serial-console.rst `”h]”hÚ)”}”(hjih]”hŒ,Documentation/admin-guide/serial-console.rst”…””}”(hjkh²hh³Nh´Nubah}”(h]”h ]”(håŒstd”Œstd-ref”eh"]”h$]”h&]”uh1hÙhjgubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”hòŒ refdomain”juŒreftype”Œref”Œ refexplicit”ˆŒrefwarn”ˆhøŒserial_console”uh1hh³hÊh´KhjMubhŒ.”…””}”(hjMh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒ¹So for instance you can use ``console=brl,ttyS0`` if the braille device is connected to the first serial port, and ``console=brl,ttyS0,115200`` to override the baud rate to 115200, etc.”h]”(hŒSo for instance you can use ”…””}”(hj‘h²hh³Nh´Nubj")”}”(hŒ``console=brl,ttyS0``”h]”hŒconsole=brl,ttyS0”…””}”(hj™h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hj‘ubhŒB if the braille device is connected to the first serial port, and ”…””}”(hj‘h²hh³Nh´Nubj")”}”(hŒ``console=brl,ttyS0,115200``”h]”hŒconsole=brl,ttyS0,115200”…””}”(hj«h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hj‘ubhŒ* to override the baud rate to 115200, etc.”…””}”(hj‘h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hXŽBy default, the braille device will just show the last kernel message (console mode). To review previous messages, press the Insert key to switch to the VT review mode. In review mode, the arrow keys permit to browse in the VT content, `PAGE-UP`/`PAGE-DOWN` keys go at the top/bottom of the screen, and the `HOME` key goes back to the cursor, hence providing very basic screen reviewing facility.”h]”(hŒîBy default, the braille device will just show the last kernel message (console mode). To review previous messages, press the Insert key to switch to the VT review mode. In review mode, the arrow keys permit to browse in the VT content, ”…””}”(hjÃh²hh³Nh´NubhŒtitle_reference”“”)”}”(hŒ `PAGE-UP`”h]”hŒPAGE-UP”…””}”(hjÍh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jËhjÃubhŒ/”…””}”(hjÃh²hh³Nh´NubjÌ)”}”(hŒ `PAGE-DOWN`”h]”hŒ PAGE-DOWN”…””}”(hjßh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jËhjÃubhŒ2 keys go at the top/bottom of the screen, and the ”…””}”(hjÃh²hh³Nh´NubjÌ)”}”(hŒ`HOME`”h]”hŒHOME”…””}”(hjñh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jËhjÃubhŒS key goes back to the cursor, hence providing very basic screen reviewing facility.”…””}”(hjÃh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒZSound feedback can be obtained by adding the ``braille_console.sound=1`` kernel parameter.”h]”(hŒ-Sound feedback can be obtained by adding the ”…””}”(hj h²hh³Nh´Nubj")”}”(hŒ``braille_console.sound=1``”h]”hŒbraille_console.sound=1”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hj ubhŒ kernel parameter.”…””}”(hj h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hX For simplicity, only one braille console can be enabled, other uses of ``console=brl,...`` will be discarded. Also note that it does not interfere with the console selection mechanism described in :ref:`Documentation/admin-guide/serial-console.rst `.”h]”(hŒGFor simplicity, only one braille console can be enabled, other uses of ”…””}”(hj)h²hh³Nh´Nubj")”}”(hŒ``console=brl,...``”h]”hŒconsole=brl,...”…””}”(hj1h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j!hj)ubhŒl will be discarded. Also note that it does not interfere with the console selection mechanism described in ”…””}”(hj)h²hh³Nh´Nubh)”}”(hŒD:ref:`Documentation/admin-guide/serial-console.rst `”h]”hÚ)”}”(hjEh]”hŒ,Documentation/admin-guide/serial-console.rst”…””}”(hjGh²hh³Nh´Nubah}”(h]”h ]”(håŒstd”Œstd-ref”eh"]”h$]”h&]”uh1hÙhjCubah}”(h]”h ]”h"]”h$]”h&]”Œrefdoc”hòŒ refdomain”jQŒreftype”Œref”Œ refexplicit”ˆŒrefwarn”ˆhøŒserial_console”uh1hh³hÊh´Khj)ubhŒ.”…””}”(hj)h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒ3For now, only the VisioBraille device is supported.”h]”hŒ3For now, only the VisioBraille device is supported.”…””}”(hjmh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K$hh·h²hubhÌ)”}”(hŒ.Samuel Thibault ”h]”(hŒSamuel Thibault <”…””}”(hj{h²hh³Nh´NubhŒ reference”“”)”}”(hŒsamuel.thibault@ens-lyon.org”h]”hŒsamuel.thibault@ens-lyon.org”…””}”(hj…h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ#mailto:samuel.thibault@ens-lyon.org”uh1jƒhj{ubhŒ>”…””}”(hj{h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K&hh·h²hubeh}”(h]”Œlinux-braille-console”ah ]”h"]”Œlinux braille console”ah$]”h&]”uh1hµhhh²hh³hÊh´Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”hÊuh1hŒcurrent_source”NŒ current_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(hºNŒ generator”NŒ datestamp”NŒ source_link”NŒ source_url”NŒ toc_backlinks”Œentry”Œfootnote_backlinks”KŒ sectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒ strip_classes”NŒ report_level”KŒ halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ traceback”ˆŒinput_encoding”Œ utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jÊŒerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œ language_code”Œen”Œrecord_dependencies”NŒconfig”NŒ id_prefix”hŒauto_id_prefix”Œid”Œ dump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”hÊŒ _destination”NŒ _config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒ raw_enabled”KŒline_length_limit”M'Œpep_references”NŒ pep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒ rfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œ smart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œ docinfo_xform”KŒsectsubtitle_xform”‰Œ image_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”j¤j¡sŒ nametypes”}”j¤‰sh}”j¡h·sŒ footnote_refs”}”Œ citation_refs”}”Œ autofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ footnotes”]”Œ citations”]”Œautofootnote_start”KŒsymbol_footnote_start”KŒ id_counter”Œ collections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œ transformer”NŒ include_log”]”Œ decoration”Nh²hub.