Bug#572011: xserver-xorg-video-radeon: After an update the display going out of normal band

[Biagio Alessandro Testa]

Today i've seen if i change my resolution(ever used) the problem ends. It's
strage because 1152x864 is a resolution supported. So i've scaled to
1024x768 and it worked fine, now i've turned it to 1152x864 again and in two
hours nothing happens and i can do all thing without problems.