https://bugs.freedesktop.org/show_bug.cgi?id=53512
--- Comment #2 from Andy Furniss lists@andyfurniss.entadsl.com 2012-08-15 23:21:19 UTC --- (In reply to comment #0)
After a while the picture gets totally garbled, and 'kernel rejected CS, see dmesg' messages are printed in mass quantity to the console. Nothing in dmesg, though. I'm using latest mesa from git, and kernel 3.5.1.
I have seen the discussion about this in the mesa-dev mailing list, but found no burgreport.
Seems to be fixed for me with latest mesa git.