Using the firefox autoscroll feature sometimes causes screen corruption as seen on attached image. Using KMS
X.Org X Server 1.7.4
ddx: git, master
Created attachment 33340 [details]
xorg.log of corrupted session
I experience this very same bug since let's say September 2009.
I own an HD4770 and I'm using all the graphic stack from git (drm-radeon-testing branch for the kernel).
This problem arises almost immediately when activating DFS or UTS.
Also, the command checker says in my dmesg that my userspace space is either too old or broken.
I'm free to try any patch this week.
Im also on a HD4770
*** This bug has been marked as a duplicate of bug 18397 ***