Comment 18 for bug 954661

Kamal Mostafa (kamalmostafa) wrote :

I've written a patch which provides a new kernel boot param "i915.enable_backlight=0".

    i915.enable_backlight=0 can be used to disable i915 backlight control
    and the /sys/class/backlight/intel_backlight interface -- useful for
    systems where intel_backight conflicts with BIOS backlight control.

An Ubuntu Precise PPA kernel with the patch applied is here:

Mario/others, please apply the PPA kernel, then boot with "i915.enable_backlight=0". This should resolve the problem (it does on my XPS13). Please confirm.