https://bugs.freedesktop.org/show_bug.cgi?id=79862
--- Comment #9 from nucrap@hotmail.com --- Appears the bug is independent of UVD enabled or not. At least with UVD enabled I have got an additional error in dmseg:
[ 236.334117] radeon 0000:0b:00.0: GPU fault detected: 146 0x0ee6480c [ 236.334121] radeon 0000:0b:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x000010F7 [ 236.334123] radeon 0000:0b:00.0: VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0604800C [ 236.334126] VM fault (0x0c, vmid 3) at page 4343, read from 'TC2' (0x54433200) (72)