https://bugzilla.kernel.org/show_bug.cgi?id=43207
--- Comment #7 from Vladislav Tcendrovskii ccvs@mail.ru 2012-05-24 16:30:46 --- I have tested kernel 3.4.
Results look a bit strange:
When i use modprobe radeon, I have the same pixel noise, which I had before.
If I start X, I have screen with windows and noise.
When I return to console, noise disappers.
If I return to X, it also works fine.