[Bug 216917] hibernation regression since 6.0.18 (Ryzen-5650U incl. Radeon GPU)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216917

Rainer Fiebig (jrf@mailbox.org) changed:

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                 CC|                            |jrf@mailbox.org

--- Comment #12 from Rainer Fiebig (jrf@mailbox.org) ---
(In reply to The Linux kernel's regression tracker (Thorsten Leemhuis) from
comment #9)
> FWIW, I just wanted to add this to the regression tracking, but 6.0.y is EOL
> now; and it seems 6.1.y works. Greg might do another fixup release, but
> maybe investigating this further is not worth it.

I beg to differ. Longterm kernels 5.15.87/88 and probably all other LTS kernels
to which commit 306df163069e78160e7a534b892c5cd6fefdd537 has been backported
are also affected. As "hibernate" is a basic, reliable feature and a hard reset
(as in my case) may result in data loss, I only see two possibilities: either
revert the commit in the longterm kernels or try to find out quickly what makes
it work for them.

The diff between 6.0.18 and 6.1.4 (where it was introduced) shows that only 86
files in /drivers/gpu/drm/amd/amdgpu have been modified. Probably only a few of
them are relevant in this matter. So for the experts it should not be too hard
to figure out a solution.

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