https://bugs.freedesktop.org/show_bug.cgi?id=45018
--- Comment #77 from Alexandre Demers alexandre.f.demers@gmail.com 2012-08-01 16:09:21 UTC --- (In reply to comment #70)
Does this kernel patch help? http://lists.freedesktop.org/archives/dri-devel/2012-July/025704.html
No, it doesn't (well not about the present bug).