Comment 3 for bug 1949497

"MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0" and "Ubuntu on Xorg" did not change anything. It gave the same error.

with "MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0":

[ 58.240910] [drm] PCIE gen 3 link speeds already enabled
[ 58.242162] amdgpu 0000:01:00.0: amdgpu: PCIE GART of 256M enabled (table at 0x000000F400000000).
[ 78.052145] [drm] PCIE gen 3 link speeds already enabled
[ 78.053444] amdgpu 0000:01:00.0: amdgpu: PCIE GART of 256M enabled (table at 0x000000F400000000).
[ 89.004997] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=45, emitted seq=47
[ 89.005811] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process glmark2 pid 3161 thread glmark2:cs0 pid 3162
[ 89.006531] amdgpu 0000:01:00.0: amdgpu: GPU recovery disabled.
[ 89.261947] Asynchronous wait on fence dma_fence_chain:unbound:1 timed out (hint:submit_notify [i915])
[ 89.262349] Asynchronous wait on fence dma_fence_chain:unbound:1 timed out (hint:submit_notify [i915])

with "Ubuntu on Xorg":

[ 38.254745] [drm] PCIE gen 3 link speeds already enabled
[ 38.255880] amdgpu 0000:01:00.0: amdgpu: PCIE GART of 256M enabled (table at 0x000000F400000000).
[ 68.697606] [drm] PCIE gen 3 link speeds already enabled
[ 68.698896] amdgpu 0000:01:00.0: amdgpu: PCIE GART of 256M enabled (table at 0x000000F400000000).
[ 80.279529] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=49, emitted seq=51
[ 80.280382] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process glmark2 pid 3198 thread glmark2:cs0 pid 3199
[ 80.281144] amdgpu 0000:01:00.0: amdgpu: GPU recovery disabled.
[ 81.047412] Asynchronous wait on fence 0000:00:02.0:gnome-shell[1686]:666 timed out (hint:intel_atomic_commit_ready [i915])
[ 81.047412] Asynchronous wait on fence dma_fence_chain:unbound:1 timed out (hint:submit_notify [i915])
[ 81.047915] Asynchronous wait on fence dma_fence_chain:unbound:1 timed out (hint:submit_notify [i915])