[Bug 211649] "drm/amd/display: reuse current context instead of recreating one" cause hdmi hotplug blackscreen on amdgpu

https://bugzilla.kernel.org/show_bug.cgi?id=211649

--- Comment #5 from Nicholas Kazlauskas (nicholas.kazlauskas@amd.com) --- It would be good to know what OS/Userspace this is, I don't think I've seen anything that has atomic check failures on nearly every flip, eg:

[ 179.142898] [drm:amdgpu_dm_atomic_check [amdgpu]] Atomic check failed with err: -22

Black screen comes from the page-flip timeout, but it's hard to say what the root cause is.

When the screen is black can you cat the DTN log and then attach the result to this ticket?

cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log

Thanks!