[Bug 221040] AMD Ryzen 5700G (Renoir/Cezanne): Second suspend hangs after "PM: suspend entry (deep)" - xhci_hcd and asus_wmi LPS0 involvement

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221040

--- Comment #6 from Bertram Ganz (s93nesua@bote.unbox.at) ---
Update: Issue resolved (kernel 6.18.42-1-lts / Mesa 26.0)

After several months of using hibernation (S4) as a workaround, I retested
suspend/resume (S3) today and completed 3 consecutive cycles successfully
with no hang - previously the second cycle would reliably hang after
"PM: suspend entry (deep)" with no further kernel output, requiring a hard
reset.

Version delta:

My original report was on:
- Kernel: 6.12.63-1-lts
- Mesa: 25.3.4

I retested a few months ago on 6.18.17-1-lts and it was still failing at
that point (see earlier comments). Just retested again on:
- Kernel: 6.18.42-1-lts
- Mesa: 26.0

...and suspend/resume now works reliably. So the fix landed somewhere
between 6.18.17 and 6.18.42 (kernel), or possibly required the Mesa 26.0
upgrade in combination - I can't pinpoint the exact patch given the size
of the jump.

Still present (but non-fatal):

These log messages still appear but no longer block suspend/resume:
  gnome-shell: Cursor update failed: drmModeAtomicCommit: Invalid argument
  xhci_hcd 0000:01:00.0: xHC error in resume, USBSTS 0x401, Reinit
  asus_wmi: failed to register LPS0 sleep handler in asus-wmi

Hardware:
- AMD Ryzen 7 5700G (Renoir/Cezanne)
- ASUS ROG STRIX B450-I GAMING (BIOS 5901)
- amdgpu.dcfeaturemask parameter removed, no longer needed

Marking this resolved (CODE_FIX) based on my own testing, since the hang no
longer occurs. I don't have the exact commit that fixed it - if anyone can
identify it, feel free to comment. Please reopen if this regresses for me
or others with similar hardware.

Also posted updates on:
- AMD GitLab: https://gitlab.freedesktop.org/drm/amd/-/issues/4927
- EndeavourOS forum:
https://forum.endeavouros.com/t/amd-ryzen-5700g-renoir-asus-b450-i-second-suspend-hangs-after-resume-xhci-hcd-asus-wmi-issues/77923
- r/AMDHelp:
https://www.reddit.com/r/AMDHelp/comments/1qv40fo/amd_ryzen_5700g_renoir_asus_b450i_second_suspend/

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