(In reply to comment #16)
> Does a 3.8 kernel it work ok if you revert mesa back to
> cf5632094ba0c19d570ea47025cf6da75ef8457a?
> 
> I think
> r600g: rework flusing and synchronization pattern v7
> http://cgit.freedesktop.org/mesa/mesa/commit/
> ?id=24b1206ab2dcd506aaac3ef656aebc8bc20cd27a
> may be problematic on cayman.

If it is, not for this bug. Went back to cf563, applied a fix for glcpp,
reloaded libraries and still locks at the same point, even after rebooting.