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Old 02-07-10, 08:05 PM   #24
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Join Date: Feb 2010
Posts: 5
Default Re: Linux backlight driver

To make the Fn keys to work, Ubuntu loads the sony-laptop module. When nvidia_bl is also loaded, then lshal shows two backlight devices in /sys/devices/virtual/backlight, which are sony and nvidia_backlight. Fn-F5, Fn-F6 keys, gnome-power-preferences and gnome-brightness applet actually work but they all change /sys/class/backlight/sony/brightness.

As a workaround, I use a slightly modified version of the script at Then I added two files into /etc/acpi/events to map Fn-F5 and Fn-F6 keys to change the brightness using that script.
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