linux-kernel - Re: Bisected regression: 4287509b4d21 causes HP Spectre 14t-ea100 to overheat while suspended

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Date:   Wed, 9 Mar 2022 19:03:08 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Philippe Troin <phil@...i.org>
Cc:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: Bisected regression: 4287509b4d21 causes HP Spectre 14t-ea100 to
 overheat while suspended

On Wed, Mar 9, 2022 at 7:02 PM Philippe Troin <phil@...i.org> wrote:
>
> On Wed, 2022-03-09 at 16:21 +0100, Rafael J. Wysocki wrote:
> > On 3/9/2022 4:50 AM, Philippe Troin wrote:
> > > Linux 5.16.9 was working fine, but starting with 5.16.10 my main laptop
> > > has been overheating while suspended.
> > > I've also tried 5.16.11, 5.16.12 and 5.16.13 and they also show the
> > > same issue (overheating while suspended).
> > >
> > > I could not spot any difference between the dmesg messages issued
> > > during suspend between a working version (5.16.9) and the the broken
> > > ones (5.16.1[0-3]).
> > >
> > > I've bisected the regression down to commit 4287509b4d21
> > > https://lore.kernel.org/lkml/20220214092510.074083242@linuxfoundation.org/
> > >
> > > I have also tried reverting that change on top of 5.16.12, and the
> > > overheating behavior is gone.
> >
> > OK, so it is not clear if this is a regression in -stable only or in the
> > mainline.
> >
> > Would it be possible to try 5.17-rc7 and see if the issue is still there?
>
> Tried 5.17-rc7, and the issue is not appearing when running it (the
> laptop does not overheat when suspended).
>
> So it looks like the problem only appears on the 5.16 branch, starting
> on 4287509b4d21.

Thanks for the confirmation!