LCD Brightness

This page is a stub
You can help ThinkWiki by expanding it.

LCD Brightness

This worked for my X61:

Once your brightness keys work, you can set the brightness by writing to the procfs:

# echo 100 > /proc/acpi/video/VID1/LCD0/brightness

using a script and acpid events. However this may lead to a bug (screen flickers) described on the Debian mailing list [[1]]. This bug is related to the X server as it does not occur on the tty1. To fix it change your xrandr backlight control to native:

$ $xrandr --output LVDS --set BACKLIGHT_CONTROL native

For my X61, these following scripts from this japanese site helped:

% cat /etc/acpi/video_brightnessdown.sh
#!/bin/sh
xbacklight -dec 10%

% cat /etc/acpi/video_brightnessup.sh
#!/bin/sh
xbacklight -inc 10%