https://bugs.freedesktop.org/show_bug.cgi?id=60347
--- Comment #3 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #2)
I've narrowed it down to one of these two kernel patches:
4ac0533abaec2b83a7f2c675010eedd55664bc26 cf4ccd016bae1a03bb38170eb54b5db4b04e0545
It's probably a mesa bug then. Since those two patches just enable mesa to use additional features (htile and DMA). Probably one of these mesa commits: 24b1206ab2dcd506aaac3ef656aebc8bc20cd27a 6532eb17baff6e61b427f29e076883f8941ae664 325422c49449acdd8df1eb2ca8ed81f7696c38cc
Does setting the env var R600_HYPERZ=0 or resetting your git tree back to cf5632094ba0c19d570ea47025cf6da75ef8457a fix the issue?