xbacklight and Knoppix 7.7.1

[philo]

The "No outputs have backlight property" error is apparently because xbacklight does not choose the right directory in /sys/class/backlight. Running:

ls /sys/class/backlight

shows that directory is named intel_backlight.

We should then be able to specify the directory by setting the Backlight option of the device in xorg.conf, configuring the section "Device" as follows:

/etc/X11/xorg.conf

Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    Option      "Backlight"  "intel_backlight"
EndSection

[philo]

Actually only these 2 lines need to be inserted:

 
Driver      "intel"
Option      "Backlight"  "intel_backlight"

Should also have mentioned the link for the solution to that issue:

https://wiki.archlinux.org/index.php...ght#xbacklight