Comment 22 for bug 765813

> --- Comment #2 from Chris Wilson <email address hidden> 2010-10-06 09:49:14 PDT ---
> Daniel, if you have the opportunity, can you check for the same issue on your
> 855? Why would gen2 be any more susceptible to this than gen3? Unlikely to be
> purely a timing issue as then there would have been some reports on i915.

I've seen this problem on my i855gm and my ilk. Can't remember whether it
happens on my i945, too. Atm I can't reproduce it anymore on any of my
machines, tough. It usually happens fairly reliable with kde
compositioning (vsync enabled) and full-screen video watching when
switching between mplayer and other apps using the cover flip. Recently
I've also seen it without composition in gnome and mesa stuff.

So my money is on timing problem ... at least for the moment.