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author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-09-21 15:51:11 +0300 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-10-24 13:12:35 +0300 |
commit | 9d85025b0418163fae079c9ba8f8445212de8568 (patch) | |
tree | 4629e2dedf4a9ed45a6855c129101f9b52138372 /Documentation/braille-console.txt | |
parent | 186128f75392f8478ad1b32a675627d738881ca4 (diff) | |
download | linux-9d85025b0418163fae079c9ba8f8445212de8568.tar.xz |
docs-rst: create an user's manual book
Place README, REPORTING-BUGS, SecurityBugs and kernel-parameters
on an user's manual book.
As we'll be numbering the user's manual, remove the manual
numbering from SecurityBugs.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/braille-console.txt')
-rw-r--r-- | Documentation/braille-console.txt | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/Documentation/braille-console.txt b/Documentation/braille-console.txt deleted file mode 100644 index fa3702dc04ab..000000000000 --- a/Documentation/braille-console.txt +++ /dev/null @@ -1,38 +0,0 @@ -Linux Braille Console -===================== - -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/serial-console.txt <serial_console>`), and -for braille device -(in :menuselection:`Device Drivers --> Accessibility support --> Console on braille device`). - -Then you need to specify a ``console=brl``, option on the kernel command line, the -format is:: - - console=brl,serial_options... - -where ``serial_options...`` are the same as described in -:ref:`Documentation/serial-console.txt <serial_console>`. - -So 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. - -By 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, -:kbd:`PAGE-UP`/:kbd:`PAGE-DOWN` keys go at the top/bottom of the screen, and -the :kbd:`HOME` key goes back -to the cursor, hence providing very basic screen reviewing facility. - -Sound feedback can be obtained by adding the ``braille_console.sound=1`` kernel -parameter. - -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/serial-console.txt <serial_console>`. - -For now, only the VisioBraille device is supported. - -Samuel Thibault <samuel.thibault@ens-lyon.org> |