https://bugzilla.kernel.org/show_bug.cgi?id=38622
--- Comment #7 from Michel Dänzer michel@daenzer.net 2011-07-04 17:54:32 --- (In reply to comment #5)
skips were entered when xserver didn't even start properly - there was no way to test if there are artefacts
Can you provide Xorg.0.log and dmesg for such a failure?
Your log narrows things down somewhat, but I'm afraid there's still a couple of potentially relevant changes in there.
(In reply to comment #6)
Would it help anything if I record video how the artifact change when using system?
Possibly.