Tested-By: Edmondo Tommasina Applied PATCH 1/6, tested with R600_HYPERZ=1 and it fixes lockup. Test environment: Kernel: 3.16.1 Libdrm: 2.4.56 Mesa: from git (83503f9e) + your PATCH 1/6 OpenGL renderer string: Gallium 0.4 on AMD CYPRESS OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.4.0-devel (git-8f06d72) OpenGL core profile shading language version string: 3.30 HUGE THANKS Marek!