[Bug 107065] "BUG: unable to handle kernel paging request at 0000000000002000" in amdgpu_vm_cpu_set_ptes at amdgpu_vm.c:921

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107065

--- Comment #21 from Andrey Grodzovsky <andrey.grodzovsky at amd.com> ---
(In reply to dwagner from comment #20)
> (In reply to Andrey Grodzovsky from comment #19)
> > I was able to reproduce this instantly without even using page tables CPU
> > update mode. Looks like a regression since S3 was working fine for long
> > time. Were you able to find a regression point for this ?
> 
> Not for the exact symptom described in this report, but for an older S3
> resume issue that was partially resolved -
> https://bugs.freedesktop.org/show_bug.cgi?id=103277 - I did once find the
> regression caused by the "drm/amd/display: Match actual state during S3
> resume" commit.
> 
> Unluckily, the many changes that followed thereafter do no longer allow to
> bisect the symptom there to one specific commit, but given that it still
> occurs if I use the option "drm.edid_firmware=edid/LG_EG9609_edid.bin", I
> think there is still some bug in the order of things done during
> re-initialization upon S3 resumes, and setting some fixed EDID seems to
> expose it as crash.

I found the offending patch - drm: Stop updating plane->crtc/fb/old_fb on
atomic drivers
Not sure yet what's going on there and not sure it will fix you issue with
amdgpu_vm_cpu_set_ptes page fault after S3 since I haven't observe it here.
Still worth a try on your side to revert it and see what happens.

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