https://bugzilla.kernel.org/show_bug.cgi?id=153121
--- Comment #21 from Kontantin Ivanov <kostyarin.ivanov at gmail.com> --- Sorry for late reply. So. I reinstall my Kubuntu completely to be sure that some install/purge ppa/firmware/etc doesn't affect the system. Now `uname -a` is: Linux hpg6 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux My Radeon card doesn't render anything (black window) but looks like it works. When I start glxgears it shows FPS but window is black and stderr is full of (see "4.4.0-34 DRI_PRIME=1 glxgears (stderr)" attachment). The "UDV not responding..." error is also present (as usual). [ 576.200519] [drm:uvd_v1_0_start [radeon]] *ERROR* UVD not responding, trying to reset the VCPU!!! [ 577.216465] [drm:uvd_v1_0_start [radeon]] *ERROR* UVD not responding, trying to reset the VCPU!!! [ 578.232004] [drm:uvd_v1_0_start [radeon]] *ERROR* UVD not responding, trying to reset the VCPU!!! [ 578.251966] [drm:uvd_v1_0_start [radeon]] *ERROR* UVD not responding, giving up!!! [ 578.252025] [drm:evergreen_startup.part.13 [radeon]] *ERROR* radeon: error initializing UVD (-1). [ 588.249875] radeon 0000:01:00.0: ring 0 stalled for more than 10000msec [ 588.249884] radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000000005 last fence id 0x0000000000000006 on ring 0) [ 588.250001] [drm:r600_ib_test [radeon]] *ERROR* radeon: fence wait failed (-35). [ 588.250042] [drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed testing IB on GFX ring (-35). [ 588.250064] [drm:radeon_resume_kms [radeon]] *ERROR* ib ring test failed (-35). I'm going to attach 4.4.0-34 files: dmesg, Xorg.0.log etc now Tell me if I need to update my kernel to rc or another release. -- You are receiving this mail because: You are watching the assignee of the bug.