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Diffstat (limited to 'Documentation/braille-console.txt')
| -rw-r--r-- | Documentation/braille-console.txt | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/Documentation/braille-console.txt b/Documentation/braille-console.txt deleted file mode 100644 index d0d042c2fd5e..000000000000 --- a/Documentation/braille-console.txt +++ /dev/null @@ -1,34 +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 serial-console.txt), and for braille device (in Device Drivers - -Accessibility). - -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 serial-console.txt - -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, -page up/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. - -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 serial-console.txt - -For now, only the VisioBraille device is supported. - -Samuel Thibault <samuel.thibault@ens-lyon.org> |