Re: [REGRESSION] Laptop with Ryzen 4600H fails to resume video since 5.17.4 (works 5.17.3)

[Thorsten Leemhuis <regressions@leemhuis.info>]

Hi, this is your Linux kernel regression tracker. Thanks for the report.

On 14.05.22 16:41, Christian Casteyde wrote:
> #regzbot introduced v5.17.3..v5.17.4
> #regzbot introduced: 001828fb3084379f3c3e228b905223c50bc237f9

FWIW, that's commit 887f75cfd0da ("drm/amdgpu: Ensure HDA function is
suspended before ASIC reset") upstream.

Recently a regression was reported where 887f75cfd0da was suspected as
the culprit:
https://gitlab.freedesktop.org/drm/amd/-/issues/2008

And a one related to it:
https://gitlab.freedesktop.org/drm/amd/-/issues/1982

You might want to take a look if what was discussed there might be
related to your problem (I'm not directly involved in any of this, I
don't know the details, it's just that 887f75cfd0da looked familiar to
me). If it is, a fix for these two bugs was committed to master earlier
this week:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a56f445f807b0276

It will likely be backported to 5.17.y, maybe already in the over-next
release. HTH.

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.

> Hello
> Since 5.17.4 my laptop doesn't resume from suspend anymore. At resume, 
> symptoms are variable:
> - either the laptop freezes;
> - either the screen keeps blank;
> - either the screen is OK but mouse is frozen;
> - either display lags with several logs in dmesg:
> [  228.275492] [drm] Fence fallback timer expired on ring gfx
> [  228.395466] [drm:amdgpu_dm_atomic_commit_tail] *ERROR* Waiting for fences 
> timed out!
> [  228.779490] [drm] Fence fallback timer expired on ring gfx
> [  229.283484] [drm] Fence fallback timer expired on ring sdma0
> [  229.283485] [drm] Fence fallback timer expired on ring gfx
> [  229.787487] [drm] Fence fallback timer expired on ring gfx
> ...
> 
> I've bisected the problem.
> 
> Please note this laptop has a strange behaviour on suspend:
> The first suspend request always fails (this point has never been fixed and 
> plagues us when trying to diagnose another regression on touchpad not resuming 
> in the past). The screen goes blank and I can get it OK when pressing the 
> power button, this seems to reset it. After that all suspend/resume works OK.
> 
> Since 5.17.4, it is not possible anymore to get the laptop working again after 
> the first suspend failure.
> 
> HW : HP Pavilion / Ryzen 4600H with AMD graphics integrated + NVidia 1650Ti 
> (turned off with ACPI call in order to get more battery, I'm not using NVidia 
> driver).
> 
> 
> 
> 
>