[ The radeon driver is discussed on the dri-devel mailing list, moving there ]
On Son, 2013-07-14 at 13:26 +0100, Sami Kerola wrote:
Jul 14 12:51:31 kerolasa-home kernel: radeon 0000:00:01.0: GPU lockup CP stall for more than 10000msec Jul 14 12:51:31 kerolasa-home kernel: radeon 0000:00:01.0: GPU lockup (waiting for 0x0000000000000004 last fence id 0x0000000000000002) Jul 14 12:51:31 kerolasa-home kernel: [drm:r600_uvd_ib_test] *ERROR* radeon: fence wait failed (-35). Jul 14 12:51:31 kerolasa-home kernel: [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on ring 5 (-35).
Looks like the patch from https://bugs.freedesktop.org/show_bug.cgi?id=66425 might help.