Comment 89 for bug 1348890

Vincent Gerris (vgerris) wrote :

Sorry, I forgot to add something.
Earlier I added a x11 conf file:
/usr/share/X11/xorg.conf.d/20-intel.conf
with content:
Section "Device"
        Identifier "card0"
        Driver "intel"
        Option "Backlight" "intel_backlight"
        BusID "PCI:0:2:0"
EndSection

This seems to be needed to actually have the :
xbacklight -dec 10
xbacklight -inc 10
working.

(the device is there and doing this as root will still work without conf:
echo 220 > /sys/class/backlight/intel_backlight/brightness ).

I am going to see if I can fix this and otherwise file a kernel bug.