€•Ù      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ/translations/zh_CN/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/zh_TW/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/it_IT/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ja_JP/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ko_KR/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒPortuguese (Brazilian)”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/pt_BR/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh–sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/sp_SP/fb/fbcon”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒThe Framebuffer Console”h]”hŒThe Framebuffer Console”…””}”(hh¼h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhh·h²hh³Œ6/var/lib/git/docbuild/linux/Documentation/fb/fbcon.rst”h´KubhŒ	paragraph”“”)”}”(hX#  The framebuffer console (fbcon), as its name implies, is a text
console running on top of the framebuffer device. It has the functionality of
any standard text console driver, such as the VGA console, with the added
features that can be attributed to the graphical nature of the framebuffer.”h]”hX#  The framebuffer console (fbcon), as its name implies, is a text
console running on top of the framebuffer device. It has the functionality of
any standard text console driver, such as the VGA console, with the added
features that can be attributed to the graphical nature of the framebuffer.”…””}”(hhÍh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒ³In the x86 architecture, the framebuffer console is optional, and
some even treat it as a toy. For other architectures, it is the only available
display device, text or graphical.”h]”hŒ³In the x86 architecture, the framebuffer console is optional, and
some even treat it as a toy. For other architectures, it is the only available
display device, text or graphical.”…””}”(hhÛh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K
hh·h²hubhÌ)”}”(hX  What are the features of fbcon?  The framebuffer console supports
high resolutions, varying font types, display rotation, primitive multihead,
etc. Theoretically, multi-colored fonts, blending, aliasing, and any feature
made available by the underlying graphics card are also possible.”h]”hX  What are the features of fbcon?  The framebuffer console supports
high resolutions, varying font types, display rotation, primitive multihead,
etc. Theoretically, multi-colored fonts, blending, aliasing, and any feature
made available by the underlying graphics card are also possible.”…””}”(hhéh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubh¶)”}”(hhh]”(h»)”}”(hŒA. Configuration”h]”hŒA. Configuration”…””}”(hhúh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhh÷h²hh³hÊh´KubhÌ)”}”(hX$  The framebuffer console can be enabled by using your favorite kernel
configuration tool.  It is under Device Drivers->Graphics Support->
Console display driver support->Framebuffer Console Support.
Select 'y' to compile support statically or 'm' for module support.  The
module will be fbcon.”h]”hX,  The framebuffer console can be enabled by using your favorite kernel
configuration tool.  It is under Device Drivers->Graphics Support->
Console display driver support->Framebuffer Console Support.
Select â€˜yâ€™ to compile support statically or â€˜mâ€™ for module support.  The
module will be fbcon.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh÷h²hubhÌ)”}”(hXu  In order for fbcon to activate, at least one framebuffer driver is
required, so choose from any of the numerous drivers available. For x86
systems, they almost universally have VGA cards, so vga16fb and vesafb will
always be available. However, using a chipset-specific driver will give you
more speed and features, such as the ability to change the video mode
dynamically.”h]”hXu  In order for fbcon to activate, at least one framebuffer driver is
required, so choose from any of the numerous drivers available. For x86
systems, they almost universally have VGA cards, so vga16fb and vesafb will
always be available. However, using a chipset-specific driver will give you
more speed and features, such as the ability to change the video mode
dynamically.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh÷h²hubhÌ)”}”(hŒXTo display the penguin logo, choose any logo available in Graphics
support->Bootup logo.”h]”hŒXTo display the penguin logo, choose any logo available in Graphics
support->Bootup logo.”…””}”(hj$  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K#hh÷h²hubhÌ)”}”(hŒ§Also, you will need to select at least one compiled-in font, but if
you don't do anything, the kernel configuration tool will select one for you,
usually an 8x16 font.”h]”hŒ©Also, you will need to select at least one compiled-in font, but if
you donâ€™t do anything, the kernel configuration tool will select one for you,
usually an 8x16 font.”…””}”(hj2  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K&hh÷h²hubhŒ
admonition”“”)”}”(hX<  A common bug report is enabling the framebuffer without enabling the
framebuffer console.  Depending on the driver, you may get a blanked or
garbled display, but the system still boots to completion.  If you are
fortunate to have a driver that does not alter the graphics chip, then you
will still get a VGA console.”h]”(h»)”}”(hŒGOTCHA”h]”hŒGOTCHA”…””}”(hjF  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºh³hÊh´K*hjB  ubhÌ)”}”(hX<  A common bug report is enabling the framebuffer without enabling the
framebuffer console.  Depending on the driver, you may get a blanked or
garbled display, but the system still boots to completion.  If you are
fortunate to have a driver that does not alter the graphics chip, then you
will still get a VGA console.”h]”hX<  A common bug report is enabling the framebuffer without enabling the
framebuffer console.  Depending on the driver, you may get a blanked or
garbled display, but the system still boots to completion.  If you are
fortunate to have a driver that does not alter the graphics chip, then you
will still get a VGA console.”…””}”(hjT  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K,hjB  ubeh}”(h]”h ]”Œadmonition-gotcha”ah"]”h$]”h&]”uh1j@  hh÷h²hh³hÊh´Nubeh}”(h]”Œa-configuration”ah ]”h"]”Œa. configuration”ah$]”h&]”uh1hµhh·h²hh³hÊh´Kubh¶)”}”(hhh]”(h»)”}”(hŒ
B. Loading”h]”hŒ
B. Loading”…””}”(hjt  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjq  h²hh³hÊh´K3ubhÌ)”}”(hŒPossible scenarios:”h]”hŒPossible scenarios:”…””}”(hj‚  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K5hjq  h²hubhŒenumerated_list”“”)”}”(hhh]”(hŒ	list_item”“”)”}”(hŒáDriver and fbcon are compiled statically

      Usually, fbcon will automatically take over your console. The notable
      exception is vesafb.  It needs to be explicitly activated with the
      vga= boot option parameter.
”h]”(hÌ)”}”(hŒ(Driver and fbcon are compiled statically”h]”hŒ(Driver and fbcon are compiled statically”…””}”(hj›  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K7hj—  ubhŒblock_quote”“”)”}”(hŒ¥Usually, fbcon will automatically take over your console. The notable
exception is vesafb.  It needs to be explicitly activated with the
vga= boot option parameter.
”h]”hÌ)”}”(hŒ¤Usually, fbcon will automatically take over your console. The notable
exception is vesafb.  It needs to be explicitly activated with the
vga= boot option parameter.”h]”hŒ¤Usually, fbcon will automatically take over your console. The notable
exception is vesafb.  It needs to be explicitly activated with the
vga= boot option parameter.”…””}”(hj¯  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K9hj«  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K9hj—  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj’  h²hh³hÊh´Nubj–  )”}”(hŒìDriver is compiled statically, fbcon is compiled as a module

      Depending on the driver, you either get a standard console, or a
      garbled display, as mentioned above.  To get a framebuffer console,
      do a 'modprobe fbcon'.
”h]”(hÌ)”}”(hŒ<Driver is compiled statically, fbcon is compiled as a module”h]”hŒ<Driver is compiled statically, fbcon is compiled as a module”…””}”(hjÍ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K=hjÉ  ubjª  )”}”(hŒœDepending on the driver, you either get a standard console, or a
garbled display, as mentioned above.  To get a framebuffer console,
do a 'modprobe fbcon'.
”h]”hÌ)”}”(hŒ›Depending on the driver, you either get a standard console, or a
garbled display, as mentioned above.  To get a framebuffer console,
do a 'modprobe fbcon'.”h]”hŒŸDepending on the driver, you either get a standard console, or a
garbled display, as mentioned above.  To get a framebuffer console,
do a â€˜modprobe fbconâ€™.”…””}”(hjß  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K?hjÛ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K?hjÉ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj’  h²hh³hÊh´Nubj–  )”}”(hX  Driver is compiled as a module, fbcon is compiled statically

      You get your standard console.  Once the driver is loaded with
      'modprobe xxxfb', fbcon automatically takes over the console with
      the possible exception of using the fbcon=map:n option. See below.
”h]”(hÌ)”}”(hŒ<Driver is compiled as a module, fbcon is compiled statically”h]”hŒ<Driver is compiled as a module, fbcon is compiled statically”…””}”(hjý  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KChjù  ubjª  )”}”(hŒÄYou get your standard console.  Once the driver is loaded with
'modprobe xxxfb', fbcon automatically takes over the console with
the possible exception of using the fbcon=map:n option. See below.
”h]”hÌ)”}”(hŒÃYou get your standard console.  Once the driver is loaded with
'modprobe xxxfb', fbcon automatically takes over the console with
the possible exception of using the fbcon=map:n option. See below.”h]”hŒÇYou get your standard console.  Once the driver is loaded with
â€˜modprobe xxxfbâ€™, fbcon automatically takes over the console with
the possible exception of using the fbcon=map:n option. See below.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KEhj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´KEhjù  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj’  h²hh³hÊh´Nubj–  )”}”(hŒDriver and fbcon are compiled as a module.

      You can load them in any order. Once both are loaded, fbcon will take
      over the console.
”h]”(hÌ)”}”(hŒ*Driver and fbcon are compiled as a module.”h]”hŒ*Driver and fbcon are compiled as a module.”…””}”(hj-  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KIhj)  ubjª  )”}”(hŒXYou can load them in any order. Once both are loaded, fbcon will take
over the console.
”h]”hÌ)”}”(hŒWYou can load them in any order. Once both are loaded, fbcon will take
over the console.”h]”hŒWYou can load them in any order. Once both are loaded, fbcon will take
over the console.”…””}”(hj?  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KKhj;  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´KKhj)  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj’  h²hh³hÊh´Nubeh}”(h]”h ]”h"]”h$]”h&]”Œenumtype”Œarabic”Œprefix”hŒsuffix”Œ.”uh1j  hjq  h²hh³hÊh´K7ubeh}”(h]”Œ	b-loading”ah ]”h"]”Œ
b. loading”ah$]”h&]”uh1hµhh·h²hh³hÊh´K3ubh¶)”}”(hhh]”(h»)”}”(hŒC. Boot options”h]”hŒC. Boot options”…””}”(hjo  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjl  h²hh³hÊh´KOubjª  )”}”(hŒaThe framebuffer console has several, largely unknown, boot options
that can change its behavior.
”h]”hÌ)”}”(hŒ`The framebuffer console has several, largely unknown, boot options
that can change its behavior.”h]”hŒ`The framebuffer console has several, largely unknown, boot options
that can change its behavior.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KQhj}  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´KQhjl  h²hubj‘  )”}”(hhh]”(j–  )”}”(hXK  fbcon=font:<name>

     Select the initial font to use. The value 'name' can be any of the
     compiled-in fonts: 10x18, 6x10, 6x8, 7x14, Acorn8x8, MINI4x6,
     PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, TER16x32, VGA8x16, VGA8x8.

     Note, not all drivers can handle font with widths not divisible by 8,
     such as vga16fb.

”h]”(hÌ)”}”(hŒfbcon=font:<name>”h]”hŒfbcon=font:<name>”…””}”(hjœ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KThj˜  ubjª  )”}”(hX  Select the initial font to use. The value 'name' can be any of the
compiled-in fonts: 10x18, 6x10, 6x8, 7x14, Acorn8x8, MINI4x6,
PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, TER16x32, VGA8x16, VGA8x8.

Note, not all drivers can handle font with widths not divisible by 8,
such as vga16fb.

”h]”(hÌ)”}”(hŒÅSelect the initial font to use. The value 'name' can be any of the
compiled-in fonts: 10x18, 6x10, 6x8, 7x14, Acorn8x8, MINI4x6,
PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, TER16x32, VGA8x16, VGA8x8.”h]”hŒÉSelect the initial font to use. The value â€˜nameâ€™ can be any of the
compiled-in fonts: 10x18, 6x10, 6x8, 7x14, Acorn8x8, MINI4x6,
PEARL8x8, ProFont6x11, SUN12x22, SUN8x16, TER16x32, VGA8x16, VGA8x8.”…””}”(hj®  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KVhjª  ubhÌ)”}”(hŒVNote, not all drivers can handle font with widths not divisible by 8,
such as vga16fb.”h]”hŒVNote, not all drivers can handle font with widths not divisible by 8,
such as vga16fb.”…””}”(hj¼  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KZhjª  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´KVhj˜  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hXG  fbcon=map:<0123>

     This is an interesting option. It tells which driver gets mapped to
     which console. The value '0123' is a sequence that gets repeated until
     the total length is 64 which is the number of consoles available. In
     the above example, it is expanded to 012301230123... and the mapping
     will be::

             tty | 1 2 3 4 5 6 7 8 9 ...
             fb  | 0 1 2 3 0 1 2 3 0 ...

             ('cat /proc/fb' should tell you what the fb numbers are)

     One side effect that may be useful is using a map value that exceeds
     the number of loaded fb drivers. For example, if only one driver is
     available, fb0, adding fbcon=map:1 tells fbcon not to take over the
     console.

     Later on, when you want to map the console the to the framebuffer
     device, you can use the con2fbmap utility.
”h]”(hÌ)”}”(hŒfbcon=map:<0123>”h]”hŒfbcon=map:<0123>”…””}”(hjÚ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K^hjÖ  ubjª  )”}”(hXï  This is an interesting option. It tells which driver gets mapped to
which console. The value '0123' is a sequence that gets repeated until
the total length is 64 which is the number of consoles available. In
the above example, it is expanded to 012301230123... and the mapping
will be::

        tty | 1 2 3 4 5 6 7 8 9 ...
        fb  | 0 1 2 3 0 1 2 3 0 ...

        ('cat /proc/fb' should tell you what the fb numbers are)

One side effect that may be useful is using a map value that exceeds
the number of loaded fb drivers. For example, if only one driver is
available, fb0, adding fbcon=map:1 tells fbcon not to take over the
console.

Later on, when you want to map the console the to the framebuffer
device, you can use the con2fbmap utility.
”h]”(hÌ)”}”(hX  This is an interesting option. It tells which driver gets mapped to
which console. The value '0123' is a sequence that gets repeated until
the total length is 64 which is the number of consoles available. In
the above example, it is expanded to 012301230123... and the mapping
will be::”h]”hX!  This is an interesting option. It tells which driver gets mapped to
which console. The value â€˜0123â€™ is a sequence that gets repeated until
the total length is 64 which is the number of consoles available. In
the above example, it is expanded to 012301230123... and the mapping
will be:”…””}”(hjì  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K`hjè  ubhŒliteral_block”“”)”}”(hŒqtty | 1 2 3 4 5 6 7 8 9 ...
fb  | 0 1 2 3 0 1 2 3 0 ...

('cat /proc/fb' should tell you what the fb numbers are)”h]”hŒqtty | 1 2 3 4 5 6 7 8 9 ...
fb  | 0 1 2 3 0 1 2 3 0 ...

('cat /proc/fb' should tell you what the fb numbers are)”…””}”hjü  sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1jú  h³hÊh´Kfhjè  ubhÌ)”}”(hŒÕOne side effect that may be useful is using a map value that exceeds
the number of loaded fb drivers. For example, if only one driver is
available, fb0, adding fbcon=map:1 tells fbcon not to take over the
console.”h]”hŒÕOne side effect that may be useful is using a map value that exceeds
the number of loaded fb drivers. For example, if only one driver is
available, fb0, adding fbcon=map:1 tells fbcon not to take over the
console.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kkhjè  ubhÌ)”}”(hŒlLater on, when you want to map the console the to the framebuffer
device, you can use the con2fbmap utility.”h]”hŒlLater on, when you want to map the console the to the framebuffer
device, you can use the con2fbmap utility.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kphjè  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K`hjÖ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hXÛ  fbcon=vc:<n1>-<n2>

     This option tells fbcon to take over only a range of consoles as
     specified by the values 'n1' and 'n2'. The rest of the consoles
     outside the given range will still be controlled by the standard
     console driver.

     .. note::
        For x86 machines, the standard console is the VGA console which
        is typically located on the same video card.  Thus, the consoles that
        are controlled by the VGA console will be garbled.
”h]”(hÌ)”}”(hŒfbcon=vc:<n1>-<n2>”h]”hŒfbcon=vc:<n1>-<n2>”…””}”(hj8  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kshj4  ubjª  )”}”(hXŸ  This option tells fbcon to take over only a range of consoles as
specified by the values 'n1' and 'n2'. The rest of the consoles
outside the given range will still be controlled by the standard
console driver.

.. note::
   For x86 machines, the standard console is the VGA console which
   is typically located on the same video card.  Thus, the consoles that
   are controlled by the VGA console will be garbled.
”h]”(hÌ)”}”(hŒÑThis option tells fbcon to take over only a range of consoles as
specified by the values 'n1' and 'n2'. The rest of the consoles
outside the given range will still be controlled by the standard
console driver.”h]”hŒÙThis option tells fbcon to take over only a range of consoles as
specified by the values â€˜n1â€™ and â€˜n2â€™. The rest of the consoles
outside the given range will still be controlled by the standard
console driver.”…””}”(hjJ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KuhjF  ubhŒnote”“”)”}”(hŒ¸For x86 machines, the standard console is the VGA console which
is typically located on the same video card.  Thus, the consoles that
are controlled by the VGA console will be garbled.”h]”hÌ)”}”(hŒ¸For x86 machines, the standard console is the VGA console which
is typically located on the same video card.  Thus, the consoles that
are controlled by the VGA console will be garbled.”h]”hŒ¸For x86 machines, the standard console is the VGA console which
is typically located on the same video card.  Thus, the consoles that
are controlled by the VGA console will be garbled.”…””}”(hj^  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K{hjZ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1jX  hjF  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´Kuhj4  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hXè  fbcon=rotate:<n>

     This option changes the orientation angle of the console display. The
     value 'n' accepts the following:

         - 0 - normal orientation (0 degree)
         - 1 - clockwise orientation (90 degrees)
         - 2 - upside down orientation (180 degrees)
         - 3 - counterclockwise orientation (270 degrees)

     The angle can be changed anytime afterwards by 'echoing' the same
     numbers to any one of the 2 attributes found in
     /sys/class/graphics/fbcon:

             - rotate     - rotate the display of the active console
             - rotate_all - rotate the display of all consoles

     Console rotation will only become available if Framebuffer Console
     Rotation support is compiled in your kernel.

     .. note::
        This is purely console rotation.  Any other applications that
        use the framebuffer will remain at their 'normal' orientation.
        Actually, the underlying fb driver is totally ignorant of console
        rotation.
”h]”(hÌ)”}”(hŒfbcon=rotate:<n>”h]”hŒfbcon=rotate:<n>”…””}”(hj‚  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj~  ubjª  )”}”(hX|  This option changes the orientation angle of the console display. The
value 'n' accepts the following:

    - 0 - normal orientation (0 degree)
    - 1 - clockwise orientation (90 degrees)
    - 2 - upside down orientation (180 degrees)
    - 3 - counterclockwise orientation (270 degrees)

The angle can be changed anytime afterwards by 'echoing' the same
numbers to any one of the 2 attributes found in
/sys/class/graphics/fbcon:

        - rotate     - rotate the display of the active console
        - rotate_all - rotate the display of all consoles

Console rotation will only become available if Framebuffer Console
Rotation support is compiled in your kernel.

.. note::
   This is purely console rotation.  Any other applications that
   use the framebuffer will remain at their 'normal' orientation.
   Actually, the underlying fb driver is totally ignorant of console
   rotation.
”h]”(hÌ)”}”(hŒfThis option changes the orientation angle of the console display. The
value 'n' accepts the following:”h]”hŒjThis option changes the orientation angle of the console display. The
value â€˜nâ€™ accepts the following:”…””}”(hj”  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj  ubjª  )”}”(hŒª- 0 - normal orientation (0 degree)
- 1 - clockwise orientation (90 degrees)
- 2 - upside down orientation (180 degrees)
- 3 - counterclockwise orientation (270 degrees)
”h]”hŒbullet_list”“”)”}”(hhh]”(j–  )”}”(hŒ!0 - normal orientation (0 degree)”h]”hÌ)”}”(hj­  h]”hŒ!0 - normal orientation (0 degree)”…””}”(hj¯  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K„hj«  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj¨  ubj–  )”}”(hŒ&1 - clockwise orientation (90 degrees)”h]”hÌ)”}”(hjÄ  h]”hŒ&1 - clockwise orientation (90 degrees)”…””}”(hjÆ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K…hjÂ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj¨  ubj–  )”}”(hŒ)2 - upside down orientation (180 degrees)”h]”hÌ)”}”(hjÛ  h]”hŒ)2 - upside down orientation (180 degrees)”…””}”(hjÝ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K†hjÙ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj¨  ubj–  )”}”(hŒ/3 - counterclockwise orientation (270 degrees)
”h]”hÌ)”}”(hŒ.3 - counterclockwise orientation (270 degrees)”h]”hŒ.3 - counterclockwise orientation (270 degrees)”…””}”(hjô  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K‡hjð  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj¨  ubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1j¦  h³hÊh´K„hj¢  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K„hj  ubhÌ)”}”(hŒŒThe angle can be changed anytime afterwards by 'echoing' the same
numbers to any one of the 2 attributes found in
/sys/class/graphics/fbcon:”h]”hŒThe angle can be changed anytime afterwards by â€˜echoingâ€™ the same
numbers to any one of the 2 attributes found in
/sys/class/graphics/fbcon:”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K‰hj  ubjª  )”}”(hŒj- rotate     - rotate the display of the active console
- rotate_all - rotate the display of all consoles
”h]”j§  )”}”(hhh]”(j–  )”}”(hŒ5rotate     - rotate the display of the active console”h]”hÌ)”}”(hj-  h]”hŒ5rotate     - rotate the display of the active console”…””}”(hj/  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj+  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj(  ubj–  )”}”(hŒ0rotate_all - rotate the display of all consoles
”h]”hÌ)”}”(hŒ/rotate_all - rotate the display of all consoles”h]”hŒ/rotate_all - rotate the display of all consoles”…””}”(hjF  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KŽhjB  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj(  ubeh}”(h]”h ]”h"]”h$]”h&]”j  j  uh1j¦  h³hÊh´Khj$  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´Khj  ubhÌ)”}”(hŒoConsole rotation will only become available if Framebuffer Console
Rotation support is compiled in your kernel.”h]”hŒoConsole rotation will only become available if Framebuffer Console
Rotation support is compiled in your kernel.”…””}”(hjf  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj  ubjY  )”}”(hŒÈThis is purely console rotation.  Any other applications that
use the framebuffer will remain at their 'normal' orientation.
Actually, the underlying fb driver is totally ignorant of console
rotation.”h]”hÌ)”}”(hŒÈThis is purely console rotation.  Any other applications that
use the framebuffer will remain at their 'normal' orientation.
Actually, the underlying fb driver is totally ignorant of console
rotation.”h]”hŒÌThis is purely console rotation.  Any other applications that
use the framebuffer will remain at their â€˜normalâ€™ orientation.
Actually, the underlying fb driver is totally ignorant of console
rotation.”…””}”(hjx  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K”hjt  ubah}”(h]”h ]”h"]”h$]”h&]”uh1jX  hj  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´Khj~  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hX@  fbcon=margin:<color>

     This option specifies the color of the margins. The margins are the
     leftover area at the right and the bottom of the screen that are not
     used by text. By default, this area will be black. The 'color' value
     is an integer number that depends on the framebuffer driver being used.
”h]”(hÌ)”}”(hŒfbcon=margin:<color>”h]”hŒfbcon=margin:<color>”…””}”(hjœ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K™hj˜  ubjª  )”}”(hX  This option specifies the color of the margins. The margins are the
leftover area at the right and the bottom of the screen that are not
used by text. By default, this area will be black. The 'color' value
is an integer number that depends on the framebuffer driver being used.
”h]”hÌ)”}”(hX  This option specifies the color of the margins. The margins are the
leftover area at the right and the bottom of the screen that are not
used by text. By default, this area will be black. The 'color' value
is an integer number that depends on the framebuffer driver being used.”h]”hX  This option specifies the color of the margins. The margins are the
leftover area at the right and the bottom of the screen that are not
used by text. By default, this area will be black. The â€˜colorâ€™ value
is an integer number that depends on the framebuffer driver being used.”…””}”(hj®  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K›hjª  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K›hj˜  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hX@  fbcon=nodefer

     If the kernel is compiled with deferred fbcon takeover support, normally
     the framebuffer contents, left in place by the firmware/bootloader, will
     be preserved until there actually is some text is output to the console.
     This option causes fbcon to bind immediately to the fbdev device.
”h]”(hÌ)”}”(hŒfbcon=nodefer”h]”hŒfbcon=nodefer”…””}”(hjÌ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K hjÈ  ubjª  )”}”(hX  If the kernel is compiled with deferred fbcon takeover support, normally
the framebuffer contents, left in place by the firmware/bootloader, will
be preserved until there actually is some text is output to the console.
This option causes fbcon to bind immediately to the fbdev device.
”h]”hÌ)”}”(hX  If the kernel is compiled with deferred fbcon takeover support, normally
the framebuffer contents, left in place by the firmware/bootloader, will
be preserved until there actually is some text is output to the console.
This option causes fbcon to bind immediately to the fbdev device.”h]”hX  If the kernel is compiled with deferred fbcon takeover support, normally
the framebuffer contents, left in place by the firmware/bootloader, will
be preserved until there actually is some text is output to the console.
This option causes fbcon to bind immediately to the fbdev device.”…””}”(hjÞ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K¢hjÚ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K¢hjÈ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hXN  fbcon=logo-pos:<location>

     The only possible 'location' is 'center' (without quotes), and when
     given, the bootup logo is moved from the default top-left corner
     location to the center of the framebuffer. If more than one logo is
     displayed due to multiple CPUs, the collected line of logos is moved
     as a whole.
”h]”(hÌ)”}”(hŒfbcon=logo-pos:<location>”h]”hŒfbcon=logo-pos:<location>”…””}”(hjü  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K§hjø  ubjª  )”}”(hX  The only possible 'location' is 'center' (without quotes), and when
given, the bootup logo is moved from the default top-left corner
location to the center of the framebuffer. If more than one logo is
displayed due to multiple CPUs, the collected line of logos is moved
as a whole.
”h]”hÌ)”}”(hX  The only possible 'location' is 'center' (without quotes), and when
given, the bootup logo is moved from the default top-left corner
location to the center of the framebuffer. If more than one logo is
displayed due to multiple CPUs, the collected line of logos is moved
as a whole.”h]”hX!  The only possible â€˜locationâ€™ is â€˜centerâ€™ (without quotes), and when
given, the bootup logo is moved from the default top-left corner
location to the center of the framebuffer. If more than one logo is
displayed due to multiple CPUs, the collected line of logos is moved
as a whole.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K©hj
  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K©hjø  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubj–  )”}”(hŒ¦fbcon=logo-count:<n>

     The value 'n' overrides the number of bootup logos. 0 disables the
     logo, and -1 gives the default which is the number of online CPUs.
”h]”(hÌ)”}”(hŒfbcon=logo-count:<n>”h]”hŒfbcon=logo-count:<n>”…””}”(hj,  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K¯hj(  ubjª  )”}”(hŒ†The value 'n' overrides the number of bootup logos. 0 disables the
logo, and -1 gives the default which is the number of online CPUs.
”h]”hÌ)”}”(hŒ…The value 'n' overrides the number of bootup logos. 0 disables the
logo, and -1 gives the default which is the number of online CPUs.”h]”hŒ‰The value â€˜nâ€™ overrides the number of bootup logos. 0 disables the
logo, and -1 gives the default which is the number of online CPUs.”…””}”(hj>  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K±hj:  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´K±hj(  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj•  h²hh³hÊh´Nubeh}”(h]”h ]”h"]”h$]”h&]”j_  j`  ja  hjb  jc  uh1j  hjl  h²hh³hÊh´KTubeh}”(h]”Œc-boot-options”ah ]”h"]”Œc. boot options”ah$]”h&]”uh1hµhh·h²hh³hÊh´KOubh¶)”}”(hhh]”(h»)”}”(hŒ%D. Attaching, Detaching and Unloading”h]”hŒ%D. Attaching, Detaching and Unloading”…””}”(hji  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjf  h²hh³hÊh´KµubhÌ)”}”(hŒzBefore going on to how to attach, detach and unload the framebuffer console, an
illustration of the dependencies may help.”h]”hŒzBefore going on to how to attach, detach and unload the framebuffer console, an
illustration of the dependencies may help.”…””}”(hjw  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K·hjf  h²hubhÌ)”}”(hŒvThe console layer, as with most subsystems, needs a driver that interfaces with
the hardware. Thus, in a VGA console::”h]”hŒuThe console layer, as with most subsystems, needs a driver that interfaces with
the hardware. Thus, in a VGA console:”…””}”(hj…  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kºhjf  h²hubjû  )”}”(hŒ&console ---> VGA driver ---> hardware.”h]”hŒ&console ---> VGA driver ---> hardware.”…””}”hj“  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´K½hjf  h²hubhÌ)”}”(hX  Assuming the VGA driver can be unloaded, one must first unbind the VGA driver
from the console layer before unloading the driver.  The VGA driver cannot be
unloaded if it is still bound to the console layer. (See
Documentation/driver-api/console.rst for more information).”h]”hX  Assuming the VGA driver can be unloaded, one must first unbind the VGA driver
from the console layer before unloading the driver.  The VGA driver cannot be
unloaded if it is still bound to the console layer. (See
Documentation/driver-api/console.rst for more information).”…””}”(hj¡  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K¿hjf  h²hubhÌ)”}”(hŒ•This is more complicated in the case of the framebuffer console (fbcon),
because fbcon is an intermediate layer between the console and the drivers::”h]”hŒ”This is more complicated in the case of the framebuffer console (fbcon),
because fbcon is an intermediate layer between the console and the drivers:”…””}”(hj¯  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÄhjf  h²hubjû  )”}”(hŒ3console ---> fbcon ---> fbdev drivers ---> hardware”h]”hŒ3console ---> fbcon ---> fbdev drivers ---> hardware”…””}”hj½  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´KÇhjf  h²hubhÌ)”}”(hŒxThe fbdev drivers cannot be unloaded if bound to fbcon, and fbcon cannot
be unloaded if it's bound to the console layer.”h]”hŒzThe fbdev drivers cannot be unloaded if bound to fbcon, and fbcon cannot
be unloaded if itâ€™s bound to the console layer.”…””}”(hjË  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÉhjf  h²hubhÌ)”}”(hX0  So to unload the fbdev drivers, one must first unbind fbcon from the console,
then unbind the fbdev drivers from fbcon.  Fortunately, unbinding fbcon from
the console layer will automatically unbind framebuffer drivers from
fbcon. Thus, there is no need to explicitly unbind the fbdev drivers from
fbcon.”h]”hX0  So to unload the fbdev drivers, one must first unbind fbcon from the console,
then unbind the fbdev drivers from fbcon.  Fortunately, unbinding fbcon from
the console layer will automatically unbind framebuffer drivers from
fbcon. Thus, there is no need to explicitly unbind the fbdev drivers from
fbcon.”…””}”(hjÙ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÌhjf  h²hubhÌ)”}”(hŒySo, how do we unbind fbcon from the console? Part of the answer is in
Documentation/driver-api/console.rst. To summarize:”h]”hŒySo, how do we unbind fbcon from the console? Part of the answer is in
Documentation/driver-api/console.rst. To summarize:”…””}”(hjç  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÒhjf  h²hubhÌ)”}”(hŒyEcho a value to the bind file that represents the framebuffer console
driver. So assuming vtcon1 represents fbcon, then::”h]”hŒxEcho a value to the bind file that represents the framebuffer console
driver. So assuming vtcon1 represents fbcon, then:”…””}”(hjõ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÕhjf  h²hubjû  )”}”(hX  echo 1 > /sys/class/vtconsole/vtcon1/bind - attach framebuffer console to
                                           console layer
echo 0 > /sys/class/vtconsole/vtcon1/bind - detach framebuffer console from
                                           console layer”h]”hX  echo 1 > /sys/class/vtconsole/vtcon1/bind - attach framebuffer console to
                                           console layer
echo 0 > /sys/class/vtconsole/vtcon1/bind - detach framebuffer console from
                                           console layer”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´KØhjf  h²hubhÌ)”}”(hX‚  If fbcon is detached from the console layer, your boot console driver (which is
usually VGA text mode) will take over.  A few drivers (rivafb and i810fb) will
restore VGA text mode for you.  With the rest, before detaching fbcon, you
must take a few additional steps to make sure that your VGA text mode is
restored properly. The following is one of the several methods that you can do:”h]”hX‚  If fbcon is detached from the console layer, your boot console driver (which is
usually VGA text mode) will take over.  A few drivers (rivafb and i810fb) will
restore VGA text mode for you.  With the rest, before detaching fbcon, you
must take a few additional steps to make sure that your VGA text mode is
restored properly. The following is one of the several methods that you can do:”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KÝhjf  h²hubj‘  )”}”(hhh]”(j–  )”}”(hŒ‰Download or install vbetool.  This utility is included with most
distributions nowadays, and is usually part of the suspend/resume tool.
”h]”hÌ)”}”(hŒˆDownload or install vbetool.  This utility is included with most
distributions nowadays, and is usually part of the suspend/resume tool.”h]”hŒˆDownload or install vbetool.  This utility is included with most
distributions nowadays, and is usually part of the suspend/resume tool.”…””}”(hj&  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kãhj"  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒ”In your kernel configuration, ensure that CONFIG_FRAMEBUFFER_CONSOLE is set
to 'y' or 'm'. Enable one or more of your favorite framebuffer drivers.
”h]”hÌ)”}”(hŒ“In your kernel configuration, ensure that CONFIG_FRAMEBUFFER_CONSOLE is set
to 'y' or 'm'. Enable one or more of your favorite framebuffer drivers.”h]”hŒ›In your kernel configuration, ensure that CONFIG_FRAMEBUFFER_CONSOLE is set
to â€˜yâ€™ or â€˜mâ€™. Enable one or more of your favorite framebuffer drivers.”…””}”(hj>  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kæhj:  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒøBoot into text mode and as root run::

     vbetool vbestate save > <vga state file>

The above command saves the register contents of your graphics
hardware to <vga state file>.  You need to do this step only once as
the state file can be reused.
”h]”(hÌ)”}”(hŒ%Boot into text mode and as root run::”h]”hŒ$Boot into text mode and as root run:”…””}”(hjV  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KéhjR  ubjû  )”}”(hŒ(vbetool vbestate save > <vga state file>”h]”hŒ(vbetool vbestate save > <vga state file>”…””}”hjd  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´KëhjR  ubhÌ)”}”(hŒ¡The above command saves the register contents of your graphics
hardware to <vga state file>.  You need to do this step only once as
the state file can be reused.”h]”hŒ¡The above command saves the register contents of your graphics
hardware to <vga state file>.  You need to do this step only once as
the state file can be reused.”…””}”(hjr  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KíhjR  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒLIf fbcon is compiled as a module, load fbcon by doing::

    modprobe fbcon
”h]”(hÌ)”}”(hŒ7If fbcon is compiled as a module, load fbcon by doing::”h]”hŒ6If fbcon is compiled as a module, load fbcon by doing:”…””}”(hjŠ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kñhj†  ubjû  )”}”(hŒmodprobe fbcon”h]”hŒmodprobe fbcon”…””}”hj˜  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´Kóhj†  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒzNow to detach fbcon::

    vbetool vbestate restore < <vga state file> && \
    echo 0 > /sys/class/vtconsole/vtcon1/bind
”h]”(hÌ)”}”(hŒNow to detach fbcon::”h]”hŒNow to detach fbcon:”…””}”(hj°  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kõhj¬  ubjû  )”}”(hŒZvbetool vbestate restore < <vga state file> && \
echo 0 > /sys/class/vtconsole/vtcon1/bind”h]”hŒZvbetool vbestate restore < <vga state file> && \
echo 0 > /sys/class/vtconsole/vtcon1/bind”…””}”hj¾  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´K÷hj¬  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒoThat's it, you're back to VGA mode. And if you compiled fbcon as a module,
you can unload it by 'rmmod fbcon'.
”h]”hÌ)”}”(hŒnThat's it, you're back to VGA mode. And if you compiled fbcon as a module,
you can unload it by 'rmmod fbcon'.”h]”hŒvThatâ€™s it, youâ€™re back to VGA mode. And if you compiled fbcon as a module,
you can unload it by â€˜rmmod fbconâ€™.”…””}”(hjÖ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KúhjÒ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hŒCTo reattach fbcon::

    echo 1 > /sys/class/vtconsole/vtcon1/bind
”h]”(hÌ)”}”(hŒTo reattach fbcon::”h]”hŒTo reattach fbcon:”…””}”(hjî  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Kýhjê  ubjû  )”}”(hŒ)echo 1 > /sys/class/vtconsole/vtcon1/bind”h]”hŒ)echo 1 > /sys/class/vtconsole/vtcon1/bind”…””}”hjü  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´Kÿhjê  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubj–  )”}”(hX‚  Once fbcon is unbound, all drivers registered to the system will also
become unbound.  This means that fbcon and individual framebuffer drivers
can be unloaded or reloaded at will. Reloading the drivers or fbcon will
automatically bind the console, fbcon and the drivers together. Unloading
all the drivers without unloading fbcon will make it impossible for the
console to bind fbcon.
”h]”hÌ)”}”(hX  Once fbcon is unbound, all drivers registered to the system will also
become unbound.  This means that fbcon and individual framebuffer drivers
can be unloaded or reloaded at will. Reloading the drivers or fbcon will
automatically bind the console, fbcon and the drivers together. Unloading
all the drivers without unloading fbcon will make it impossible for the
console to bind fbcon.”h]”hX  Once fbcon is unbound, all drivers registered to the system will also
become unbound.  This means that fbcon and individual framebuffer drivers
can be unloaded or reloaded at will. Reloading the drivers or fbcon will
automatically bind the console, fbcon and the drivers together. Unloading
all the drivers without unloading fbcon will make it impossible for the
console to bind fbcon.”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj  h²hh³hÊh´Nubeh}”(h]”h ]”h"]”h$]”h&]”j_  j`  ja  hjb  jc  uh1j  hjf  h²hh³hÊh´Kãubeh}”(h]”Œ#d-attaching-detaching-and-unloading”ah ]”h"]”Œ%d. attaching, detaching and unloading”ah$]”h&]”uh1hµhh·h²hh³hÊh´Kµubh¶)”}”(hhh]”(h»)”}”(hŒNotes for vesafb users:”h]”hŒNotes for vesafb users:”…””}”(hj9  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhj6  h²hh³hÊh´M	ubhÌ)”}”(hX  Unfortunately, if your bootline includes a vga=xxx parameter that sets the
hardware in graphics mode, such as when loading vesafb, vgacon will not load.
Instead, vgacon will replace the default boot console with dummycon, and you
won't get any display after detaching fbcon. Your machine is still alive, so
you can reattach vesafb. However, to reattach vesafb, you need to do one of
the following:”h]”hX  Unfortunately, if your bootline includes a vga=xxx parameter that sets the
hardware in graphics mode, such as when loading vesafb, vgacon will not load.
Instead, vgacon will replace the default boot console with dummycon, and you
wonâ€™t get any display after detaching fbcon. Your machine is still alive, so
you can reattach vesafb. However, to reattach vesafb, you need to do one of
the following:”…””}”(hjG  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhj6  h²hubhÌ)”}”(hŒVariation 1:”h]”hŒVariation 1:”…””}”(hjU  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhj6  h²hubjª  )”}”(hXK  a. Before detaching fbcon, do::

    vbetool vbemode save > <vesa state file> # do once for each vesafb mode,
                                             # the file can be reused

b. Detach fbcon as in step 5.

c. Attach fbcon::

    vbetool vbestate restore < <vesa state file> && \
    echo 1 > /sys/class/vtconsole/vtcon1/bind
”h]”j‘  )”}”(hhh]”(j–  )”}”(hŒ«Before detaching fbcon, do::

 vbetool vbemode save > <vesa state file> # do once for each vesafb mode,
                                          # the file can be reused
”h]”(hÌ)”}”(hŒBefore detaching fbcon, do::”h]”hŒBefore detaching fbcon, do:”…””}”(hjn  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhjj  ubjû  )”}”(hŒŠvbetool vbemode save > <vesa state file> # do once for each vesafb mode,
                                         # the file can be reused”h]”hŒŠvbetool vbemode save > <vesa state file> # do once for each vesafb mode,
                                         # the file can be reused”…””}”hj|  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´Mhjj  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hjg  ubj–  )”}”(hŒDetach fbcon as in step 5.
”h]”hÌ)”}”(hŒDetach fbcon as in step 5.”h]”hŒDetach fbcon as in step 5.”…””}”(hj”  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hjg  ubj–  )”}”(hŒnAttach fbcon::

 vbetool vbestate restore < <vesa state file> && \
 echo 1 > /sys/class/vtconsole/vtcon1/bind
”h]”(hÌ)”}”(hŒAttach fbcon::”h]”hŒAttach fbcon:”…””}”(hj¬  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Mhj¨  ubjû  )”}”(hŒ[vbetool vbestate restore < <vesa state file> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind”h]”hŒ[vbetool vbestate restore < <vesa state file> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind”…””}”hjº  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´Mhj¨  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hjg  ubeh}”(h]”h ]”h"]”h$]”h&]”j_  Œ
loweralpha”ja  hjb  jc  uh1j  hjc  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´Mhj6  h²hubhÌ)”}”(hŒVariation 2:”h]”hŒVariation 2:”…””}”(hjÛ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M hj6  h²hubjª  )”}”(hX  a. Before detaching fbcon, do::

    echo <ID> > /sys/class/tty/console/bind

    vbetool vbemode get

b. Take note of the mode number

b. Detach fbcon as in step 5.

c. Attach fbcon::

    vbetool vbemode set <mode number> && \
    echo 1 > /sys/class/vtconsole/vtcon1/bind
”h]”(j‘  )”}”(hhh]”(j–  )”}”(hŒ]Before detaching fbcon, do::

 echo <ID> > /sys/class/tty/console/bind

 vbetool vbemode get
”h]”(hÌ)”}”(hŒBefore detaching fbcon, do::”h]”hŒBefore detaching fbcon, do:”…””}”(hjô  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M"hjð  ubjû  )”}”(hŒ<echo <ID> > /sys/class/tty/console/bind

vbetool vbemode get”h]”hŒ<echo <ID> > /sys/class/tty/console/bind

vbetool vbemode get”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´M$hjð  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hjí  ubj–  )”}”(hŒTake note of the mode number
”h]”hÌ)”}”(hŒTake note of the mode number”h]”hŒTake note of the mode number”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M(hj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hjí  ubeh}”(h]”h ]”h"]”h$]”h&]”j_  jÔ  ja  hjb  jc  uh1j  hjé  ubj‘  )”}”(hhh]”(j–  )”}”(hŒDetach fbcon as in step 5.
”h]”hÌ)”}”(hŒDetach fbcon as in step 5.”h]”hŒDetach fbcon as in step 5.”…””}”(hj;  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M*hj7  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj4  ubj–  )”}”(hŒcAttach fbcon::

 vbetool vbemode set <mode number> && \
 echo 1 > /sys/class/vtconsole/vtcon1/bind
”h]”(hÌ)”}”(hŒAttach fbcon::”h]”hŒAttach fbcon:”…””}”(hjS  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M,hjO  ubjû  )”}”(hŒPvbetool vbemode set <mode number> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind”h]”hŒPvbetool vbemode set <mode number> && \
echo 1 > /sys/class/vtconsole/vtcon1/bind”…””}”hja  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´M.hjO  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•  hj4  ubeh}”(h]”h ]”h"]”h$]”h&]”j_  jÔ  ja  hjb  jc  Œstart”Kuh1j  hjé  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j©  h³hÊh´M"hj6  h²hubeh}”(h]”Œnotes-for-vesafb-users”ah ]”h"]”Œnotes for vesafb users:”ah$]”h&]”uh1hµhh·h²hh³hÊh´M	ubh¶)”}”(hhh]”(h»)”}”(hŒSamples:”h]”hŒSamples:”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhjŠ  h²hh³hÊh´M2ubhÌ)”}”(hŒ{Here are 2 sample bash scripts that you can use to bind or unbind the
framebuffer console driver if you are on an X86 box::”h]”hŒzHere are 2 sample bash scripts that you can use to bind or unbind the
framebuffer console driver if you are on an X86 box:”…””}”(hj›  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´M4hjŠ  h²hubjû  )”}”(hXl  #!/bin/bash
# Unbind fbcon

# Change this to where your actual vgastate file is located
# Or Use VGASTATE=$1 to indicate the state file at runtime
VGASTATE=/tmp/vgastate

# path to vbetool
VBETOOL=/usr/local/bin


for (( i = 0; i < 16; i++))
do
  if test -x /sys/class/vtconsole/vtcon$i; then
      if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \
           = 1 ]; then
          if test -x $VBETOOL/vbetool; then
             echo Unbinding vtcon$i
             $VBETOOL/vbetool vbestate restore < $VGASTATE
             echo 0 > /sys/class/vtconsole/vtcon$i/bind
          fi
      fi
  fi
done”h]”hXl  #!/bin/bash
# Unbind fbcon

# Change this to where your actual vgastate file is located
# Or Use VGASTATE=$1 to indicate the state file at runtime
VGASTATE=/tmp/vgastate

# path to vbetool
VBETOOL=/usr/local/bin


for (( i = 0; i < 16; i++))
do
  if test -x /sys/class/vtconsole/vtcon$i; then
      if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \
           = 1 ]; then
          if test -x $VBETOOL/vbetool; then
             echo Unbinding vtcon$i
             $VBETOOL/vbetool vbestate restore < $VGASTATE
             echo 0 > /sys/class/vtconsole/vtcon$i/bind
          fi
      fi
  fi
done”…””}”hj©  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´M7hjŠ  h²hubhŒ
transition”“”)”}”(hŒK---------------------------------------------------------------------------”h]”h}”(h]”h ]”h"]”h$]”h&]”uh1j·  h³hÊh´MPhjŠ  h²hubjû  )”}”(hX2  #!/bin/bash
# Bind fbcon

for (( i = 0; i < 16; i++))
do
  if test -x /sys/class/vtconsole/vtcon$i; then
      if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \
           = 1 ]; then
        echo Unbinding vtcon$i
        echo 1 > /sys/class/vtconsole/vtcon$i/bind
      fi
  fi
done”h]”hX2  #!/bin/bash
# Bind fbcon

for (( i = 0; i < 16; i++))
do
  if test -x /sys/class/vtconsole/vtcon$i; then
      if [ `cat /sys/class/vtconsole/vtcon$i/name | grep -c "frame buffer"` \
           = 1 ]; then
        echo Unbinding vtcon$i
        echo 1 > /sys/class/vtconsole/vtcon$i/bind
      fi
  fi
done”…””}”hjÃ  sbah}”(h]”h ]”h"]”h$]”h&]”j
  j  uh1jú  h³hÊh´MThjŠ  h²hubhÌ)”}”(hŒ!Antonino Daplas <adaplas@pol.net>”h]”(hŒAntonino Daplas <”…””}”(hjÑ  h²hh³Nh´NubhŒ	reference”“”)”}”(hŒadaplas@pol.net”h]”hŒadaplas@pol.net”…””}”(hjÛ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œmailto:adaplas@pol.net”uh1jÙ  hjÑ  ubhŒ>”…””}”(hjÑ  h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´MbhjŠ  h²hubeh}”(h]”Œsamples”ah ]”h"]”Œsamples:”ah$]”h&]”uh1hµhh·h²hh³hÊh´M2ubeh}”(h]”Œthe-framebuffer-console”ah ]”h"]”Œthe framebuffer console”ah$]”h&]”uh1hµhhh²hh³hÊh´Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”hÊuh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(hºNŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
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