http://bugzilla.novell.com/show_bug.cgi?id=549994
http://bugzilla.novell.com/show_bug.cgi?id=549994#c5
--- Comment #5 from Matthias Hanisch 2010-02-10 00:11:39 UTC ---
I checked the /proc interface as described above in comment from Michail.
Initially it is setup like this:
pingu:/proc/acpi/video/GFX0 # cat DD02/brightness
levels: 10 20 30 40 50 60 70 80 90 100
current: 70
I can change the value here but it has no visual effect:
pingu:/proc/acpi/video/GFX0/DD02 # echo 10 > brightness
pingu:/proc/acpi/video/GFX0/DD02 # cat brightness
levels: 10 20 30 40 50 60 70 80 90 100
current: 10
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