https://bugzilla.kernel.org/show_bug.cgi?id=19592





--- Comment #15 from Pavol Klačanský <pa...@klacansky.com>  2012-01-18 14:43:07 
---
Tried with this kernel

uname -r
3.2.0-999-generic

There some investigation
http://ubuntuforums.org/showthread.php?t=1567074

But, I think, it works like this, when you press key, kernel changes brightness
and also report that key was pressed, so gnome-power-manager also changes
brightness (2 steps then, because 1 by kernel + 1 by GPM).

We need to get kernel detecting that GPM is running or so, or just support
computers and remove function from GPM.

Or just simply patch GPM to watch, if kernel already changed brightness, if so,
then GPM will just report it was changed and do not change again

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