Created attachment 216121 [details] dmesg output attached 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7480D] Linux debian 4.5.4 #1 SMP Thu May 12 19:55:29 IST 2016 x86_64 GNU/Linux i get an error during bootup... [drm] radeon: irq initialized. [ 11.556777] [drm] ring test on 0 succeeded in 2 usecs [ 11.556788] [drm] ring test on 3 succeeded in 3 usecs [ 11.556795] [drm] ring test on 4 succeeded in 3 usecs [ 11.602519] [drm] ring test on 5 succeeded in 1 usecs [ 11.622959] [drm] UVD initialized successfully. [ 12.714405] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 13.726471] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 14.738556] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 15.750620] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 16.762679] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 17.774740] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 18.786801] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 19.798864] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 20.810927] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 21.822998] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, trying to reset the ECPU!!! [ 21.842908] [drm:vce_v1_0_start [radeon]] *ERROR* VCE not responding, giving up!!! [ 21.842975] [drm:cayman_startup [radeon]] *ERROR* radeon: failed initializing VCE (-1). [ 21.843923] [drm] ib test on ring 0 succeeded in 0 usecs [ 21.844446] [drm] ib test on ring 3 succeeded in 0 usecs [ 21.844963] [drm] ib test on ring 4 succeeded in 0 usecs [ 21.865376] [drm] ib test on ring 5 succeeded