I tested with 4.6.0-040600rc6-generic but the problem persists. Making pause and play again in SMPlayes gives the following syslog output:
May 5 23:55:05 HOME kernel: [ 308.448015] radeon 0000:01:00.0: ring 5 stalled for more than 10000msec May 5 23:55:05 HOME kernel: [ 308.448021] radeon 0000:01:00.0: GPU lockup (current fence id 0x0000000000000e02 last fence id 0x0000000000000e0b on ring 5) May 5 23:55:05 HOME kernel: [ 308.482242] radeon 0000:01:00.0: GPU reset succeeded, trying to resume May 5 23:55:05 HOME kernel: [ 308.491775] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0 May 5 23:55:05 HOME kernel: [ 308.493998] [drm] PCIE GART of 1024M enabled (table at 0x000000000025E000). May 5 23:55:05 HOME kernel: [ 308.494017] radeon 0000:01:00.0: WB enabled May 5 23:55:05 HOME kernel: [ 308.494020] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000020000c00 and cpu addr 0xffff880034aa6c00 May 5 23:55:05 HOME kernel: [ 308.494023] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000020000c0c and cpu addr 0xffff880034aa6c0c May 5 23:55:05 HOME kernel: [ 308.494409] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c598 and cpu addr 0xffffc9000181c598 May 5 23:55:05 HOME kernel: [ 308.540202] [drm] ring test on 0 succeeded in 1 usecs May 5 23:55:05 HOME kernel: [ 308.540208] [drm] ring test on 3 succeeded in 2 usecs May 5 23:55:06 HOME kernel: [ 308.714841] [drm] ring test on 5 succeeded in 1 usecs May 5 23:55:06 HOME kernel: [ 308.714847] [drm] UVD initialized successfully. May 5 23:55:06 HOME kernel: [ 308.919526] [drm] ib test on ring 0 succeeded in 0 usecs May 5 23:55:06 HOME kernel: [ 308.919554] [drm] ib test on ring 3 succeeded in 0 usecs May 5 23:55:07 HOME kernel: [ 310.068059] [drm:uvd_v1_0_ib_test [radeon]] *ERROR* radeon: fence wait timed out. May 5 23:55:07 HOME kernel: [ 310.068089] [drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed testing IB on ring 5 (-110). and makes X freeze. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1574845 Title: Hardware accelerated video decoding causes GPU crash (radeon driver) Status in linux package in Ubuntu: Confirmed Bug description: SMPlayer with vdpau output plays video ok, but after stopping video in few seconds system freezes. I attach smplayer.log with syslog messages during crash. The same happens with Kodi. I attach kodi.log with syslog messages during crash. Beside that system works ok, playing video wihout hardware acceleration works ok, GPU intensive games work stable. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1574845/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp