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I posted this on CS:GO Forums on Steam Website bud did't got respons either from the Community nor from Valve.
[Steam Discussion I started.](http://steamcommunity.com/app/730/discussions/0/458607518208802869/)
Here's my Problem:
I play CS:GO on Linux and can't change the brightness, it's always at the standard brightness.
I tried different things.
I put the command "mat_monitorgamma 1.9" in my autoexec and tried it manual in game with the console, but it didn't work.
I have a problem to see the enemys in dark corners, because I have bad eyes.
So I only want to raise the brightness in a legit limit, but thats not possible.
It worked with my old Nvidia GT 630 I got from a friend, but it hasn't enough graphics power to run game as I like to.
My PC:
OS: Xubuntu 15.10 (I use Compiz as WM, because it has almost double fps in Games)
CPU/GPU: AMD A10-7850k with latest fglrx-update
(aaand yes I plan to buy a nvidia card next time. I just switched from Windows half a year ago and now I'm stuck with this AMD card)
If you need any further infos, feel free to ask. I don't know what else to post.
If so, I'm sry for my bad english. I'm from Germany.