I tried that but the problem stays the same. But you have a point because I allready noticed this in my xorg log so I changed it.
(WW) RADEON(0): Direct Rendering is disabled by default on Radeon VE/7000
hardware due to instability, but has been forced on with
"Option "dri" in xorg.conf. You may experience instability.
(EE) RADEON(0): Idle timed out, resetting engine...
(EE) RADEON(0): Idle timed out, resetting engine...
(EE) RADEON(0): Idle timed out, resetting engine...
(EE) RADEON(0): Idle timed out, resetting engine...