Created attachment 863857 [details]
journal

The system readily suspends. But resume is very slow and exhibits trouble with
drm:

[  195.129982] kernel: [drm] PCIE GART of 256M enabled (table at
0x000000F400300000).
[  195.831331] kernel: [drm] Fence fallback timer expired on ring sdma0
[  196.343309] kernel: [drm] Fence fallback timer expired on ring sdma0
[  196.855320] kernel: [drm] Fence fallback timer expired on ring sdma0
[  197.367318] kernel: [drm] Fence fallback timer expired on ring sdma0
[  197.879296] kernel: [drm] Fence fallback timer expired on ring sdma0
[  198.391313] kernel: [drm] Fence fallback timer expired on ring sdma0
[  198.903334] kernel: [drm] Fence fallback timer expired on ring sdma0
[  199.415327] kernel: [drm] Fence fallback timer expired on ring sdma0
[  199.927300] kernel: [drm] Fence fallback timer expired on ring sdma0
[  200.439297] kernel: [drm] Fence fallback timer expired on ring sdma0
[  200.951299] kernel: [drm] Fence fallback timer expired on ring sdma0
[  201.463085] kernel: [drm] Fence fallback timer expired on ring sdma0
[  201.975089] kernel: [drm] Fence fallback timer expired on ring sdma0
[  202.487089] kernel: [drm] Fence fallback timer expired on ring sdma0
[  202.999090] kernel: [drm] Fence fallback timer expired on ring sdma0
[  203.511090] kernel: [drm] Fence fallback timer expired on ring sdma0
[  204.023091] kernel: [drm] Fence fallback timer expired on ring sdma0
[  204.535091] kernel: [drm] Fence fallback timer expired on ring sdma0
[  205.047358] kernel: [drm] Fence fallback timer expired on ring sdma0
[  205.123518] kernel: [drm] UVD and UVD ENC initialized successfully.
[  205.223510] kernel: [drm] VCE initialized successfully.

See also attached journal.