https://bugs.freedesktop.org/show_bug.cgi?id=111481 --- Comment #115 from Mark Dietzer --- For me it seems to happen commonly when I watch 60fps video (YouTube) using Firefox on my RX 5700 XT (currently on Fedora 31 with latest distro packages). Even 4K video at 30fps does not seem to cause any issues. I have not yet managed to reproduce the hang in gaming or benchmark use (no matter if OpenGL or Vulkan) The first time this happened today it was accompanied by the following kernel messages and led to a full lockup of graphics until reboot: amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb, param 0x80 amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb param 0x80 amdgpu: [powerplay] Failed to export SMU metrics table! amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb, param 0x80 amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb param 0x80 amdgpu: [powerplay] Failed to export SMU metrics table! amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb, param 0x80 amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb param 0x80 amdgpu: [powerplay] Failed to export SMU metrics table! amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb, param 0x80 amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb param 0x80 amdgpu: [powerplay] Failed to export SMU metrics table! amdgpu: [powerplay] Failed to send message 0x36, response 0xfffffffb, param 0x0 amdgpu: [powerplay] Failed to send message 0x36, response 0xfffffffb param 0x0 amdgpu: [powerplay] [smu_v11_0_get_power_limit] get PPT limit failed! amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb, param 0x80 amdgpu: [powerplay] Failed to send message 0xe, response 0xfffffffb param 0x80 amdgpu: [powerplay] Failed to export SMU metrics table! [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma0 timeout, signaled seq=202333, emitted seq=202336 [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process pid 0 thread pid 0 The second time, it was only a short (few seconds) hang and yielded the following kernel output, currently still up and running after that message: [drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed out or interrupted! -- You are receiving this mail because: You are the assignee for the bug.