Comment # 7 on bug 61747 from Alex Deucher

(In reply to comment #6)
> (In reply to comment #5)
> > Can you bisect mesa?
> 
> I'm not sure that makes sense. The crashes started after Fedora upgraded its
> 3.7.9 kernel to one based on 3.8.1, and so I have no idea if there's even a
> "good" commit in Mesa to start bisecting from.

I'm guessing the kernel update enabled some additional feature in mesa (htile
or async/cp dma support).  Does disabling htile support help?  Set env var
R600_HYPERZ=0