how to help pinpoint ring 0 stalling on resuming from suspend only when ShadowPrimary is disabled?

[Paul Dufresne]

Hi! I am a unsure how this message is appropriate here as most messages are patches.



I have temporary access (while helping the computer with a full disk situation), to test a computer with RS780C GPU,

where when resuming with default ShadowPrimary off, ring 0 stalled happens on almost each resume from suspend to ram.

Seems fixed by enabling ShadowPrimary (radeon driver).

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1944991

I mentions this bug on: https://bugzilla.kernel.org/show_bug.cgi?id=85421



The question is there some test I could do that would help pinpoint the problem?

Like a particular drm.debug value boot parameter or something similar?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20211002/04af150e/attachment.htm>