Comment # 12 on bug 95015 from raulvior.bcn@gmail.com

(In reply to raulvior.bcn from comment #11)
> When I mean the same exact error I mean the same address too.

This:
 may 08 19:13:31 username-portatil kernel: [drm:r600_ring_test [radeon]]
*ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)