linux-kernel - Re: [regression] 6.8.1: fails to hibernate with pm_runtime_force

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Message-ID: <12413606.O9o76ZdvQC@lichtvoll.de>
Date: Fri, 05 Apr 2024 13:54:34 +0200
From: Martin Steigerwald <martin@...htvoll.de>
To: linux-pm@...r.kernel.org, regressions@...ts.linux.dev,
 linux-kernel@...r.kernel.org,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject:
 Re: [regression] 6.8.1: fails to hibernate with
 pm_runtime_force_suspend+0x0/0x120 returns -16

Martin Steigerwald - 05.04.24, 13:49:00 CEST:
> Linux regression tracking (Thorsten Leemhuis) - 19.03.24, 09:40:06 CEST:
> > On 16.03.24 17:12, Martin Steigerwald wrote:
> > > Martin Steigerwald - 16.03.24, 17:02:44 CET:
> > >> ThinkPad T14 AMD Gen 1 fails to hibernate with self-compiled 6.8.1.
> > >> Hibernation works correctly with self-compiled 6.7.9.
> > > 
> > > Apparently 6.8.1 does not even reboot correctly anymore. runit on
> > > Devuan. It says it is doing the system reboot but then nothing
> > > happens.
> > > 
> > > As for hibernation the kernel cancels the attempt and returns back
> > > to
> > > user space desktop session.
> > > 
> > >> Trying to use "no_console_suspend" to debug next. Will not do
> > >> bisect
> > >> between major kernel releases on a production machine.
> > 
> > FWIW, without a bisection I guess no developer will take a closer look
> > (but I might be wrong and you lucky here!), as any change in those
> > hundreds of drivers used on that machine can possibly lead to problems
> > like yours. So without a bisection we are likely stuck here, unless
> > someone else runs into the same problem and bisects or fixes it.
> > Sorry, but that's just how it is.
> 
> The plot thickens, now 6.7.12 as compared to 6.7.11 which failed
> hibernation with busy work queues¹ and 6.7.9 + bcachefs downgrade fixes
> fails hibernation with the same error message than 6.8.1:
[…]
> Not doing it today or probably the weekend, but now I have some
> actionable git bisect plan without bisecting between major kernel
> releases which as I have been told between 6.7 an 6.8-rc1 can lead to
> non working modeset graphics on AMD Ryzen in between.
> 
> It seems now I only need to git bisect between 6.7.11 and 6.7.12 to find
> the patch that breaks hibernation on 6.8.1 as well. However first I
> will briefly check whether 6.8.4 hibernates okay.

6.8.4 is still affected and fails hibernation with the same error message.

> [1] * 6.7.11: Fails to hibernate - work queues still busy
> @ 2024-04-02 19:29 Martin Steigerwald
> 
> https://lore.kernel.org/regressions/2ad93b57-8fdc-476e-83b7-2c0af1cfd41d
> @leemhuis.info/T/#t

-- 
Martin