Message-ID: <YqoLjk8P+fChJ04m@llamedos.localdomain>
Date:   Wed, 15 Jun 2022 17:40:46 +0100
From:   Ken Moffat <zarniwhoop@...world.com>
To:     Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     linux-kernel@...r.kernel.org,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        Linux PM <linux-pm@...r.kernel.org>,
        Pavel Machek <pavel@....cz>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Dmitry Osipenko <dmitry.osipenko@...labora.com>
Subject: Re: regression, 5.19.0-rc1 not powering off when hibernated

On Mon, Jun 13, 2022 at 08:46:22PM +0100, Ken Moffat wrote:

Adding Dmitry because of git blame (details at end)

> On Sat, Jun 11, 2022 at 06:23:32PM +0100, Ken Moffat wrote:
> > On Sat, Jun 11, 2022 at 03:53:44PM +0200, Thorsten Leemhuis wrote:
> > > Hi, this is your Linux kernel regression tracker.
> > > 
> > > CCing the regression mailing list, as it should be in the loop for all
> > > regressions, as explained here:
> > > https://www.kernel.org/doc/html/latest/admin-guide/reporting-issues.html
> > > Also CCing the hibernation maintainers and Linux-pm.
> > > 
> > > On 09.06.22 01:55, Ken Moffat wrote:
> > > > Up to 5.18.0 hibernation has worked ok on my ryzen 5 3400G : screen
> > > > blanks, disk activity for the write to swap, screen briefly has a
> > > > trashed display, machine powers off.  When powering up from
> > > > hibernation, after the saved files are loaded X starts with a
> > > > briefly trashed display before my desktop reappears.
> > > > 
> > > > But with 5.19.0-rc1 the screen is blank throughtout the hibernation,
> > > > and briefly when restoring (no complaint about that), but when
> > > > hibernating it no longer powers off and I have to hold the on/off
> > > > switch to power off.
> > > > 
> > > > Is this a known problem ?
> > > 
> > > Thanks for the report. Maybe the hibernation maintainers might know, but
> > > often issues like this are caused by other things like drivers. If they
> > > don#t have a idea, you likely need to do a bisection to get down to the
> > > change that introduced this regressions.
> > > 
> > > Anyway: To be sure below issue doesn't fall through the cracks
> > > unnoticed, I'm adding it to regzbot, my Linux kernel regression tracking
> > > bot:
> > > 
> > > #regzbot ^introduced v5.18..v5.19-rc1
> > > #regzbot title hibernate: Not powering off when hibernated
> > > #regzbot ignore-activity
> > > 
> > > This isn't a regression? This issue or a fix for it are already
> > > discussed somewhere else? It was fixed already? You want to clarify when
> > > the regression started to happen? Or point out I got the title or
> > > something else totally wrong? Then just reply -- ideally with also
> > > telling regzbot about it, as explained here:
> > > https://linux-regtracking.leemhuis.info/tracked-regression/
> > > 
> > > Reminder for developers: When fixing the issue, add 'Link:' tags
> > > pointing to the report (the mail this one replied to), as the kernel's
> > > documentation call for; above page explains why this is important for
> > > tracked regressions.
> > > 
> > > 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.
> > 
> > Thanks.  I've started to bisect, but I've got a lot else on and it
> > might be a few days before I get a result.  All I know so far is
> > that whatever got rid of the garbled screens was fine, and the
> > problem seems to have arisen in the last 800+ commits for 5.19-rc1.
> > 
> I think I must have gone wrong somewhere in that bisection, it took
> me through a load of habanalabs commits which were all good, and
> blamed the merge which for this which *was* definitely bad, but seems
> to have nothing related to the box not powering off on hibernation::
> 
Indeed, on the second attempt I've got a much more likely commit to
blame:

98f30d0ecf79da8cf17a171fa4cf6eda7ba4dd71 is the first bad commit
commit 98f30d0ecf79da8cf17a171fa4cf6eda7ba4dd71
Author: Dmitry Osipenko <dmitry.osipenko@...labora.com>
Date:   Tue May 10 02:32:30 2022 +0300

    ACPI: power: Switch to sys-off handler API
    
    Switch to sys-off API that replaces legacy pm_power_off callbacks,
    allowing us to remove global pm_* variables and support chaining of
    all restart and power-off modes consistently.
    
    Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Unsurprisingly, with this reverted 5.19-rc2 fails to build.

ĸen

Bisect log follows:

git bisect start
# good: [4b0986a3613c92f4ec1bdc7f60ec66fea135991f] Linux 5.18
git bisect good 4b0986a3613c92f4ec1bdc7f60ec66fea135991f
# bad: [f2906aa863381afb0015a9eb7fefad885d4e5a56] Linux 5.19-rc1
git bisect bad f2906aa863381afb0015a9eb7fefad885d4e5a56
# skip: [2518f226c60d8e04d18ba4295500a5b0b8ac7659] Merge tag 'drm-next-2022-05-25' of git://anongit.freedesktop.org/drm/drm
git bisect skip 2518f226c60d8e04d18ba4295500a5b0b8ac7659
# good: [8a87419481f2d51a7bd03617d363faf5f2b0e1b3] arm64: dts: mediatek: mt8195-demo: Remove input-name property
git bisect good 8a87419481f2d51a7bd03617d363faf5f2b0e1b3
# good: [0813aeee0d02d80912c86b2b3a1ebdb4ee4476ba] Merge branch 'tcp-pass-back-data-left-in-socket-after-receive' of git://git.kernel.org/pub/scm/linux/kernel/git/kuba/linux
git bisect good 0813aeee0d02d80912c86b2b3a1ebdb4ee4476ba
# good: [d7227785e384d4422b3ca189aa5bf19f462337cc] Merge tag 'sound-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
git bisect good d7227785e384d4422b3ca189aa5bf19f462337cc
# good: [907bb57aa7b471872aab2f2e83e9713a145673f9] Merge tag 'pinctrl-v5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
git bisect good 907bb57aa7b471872aab2f2e83e9713a145673f9
# bad: [5ac8bdb9ad47334a9590e29daf7e4149b0a34729] Merge tag 'io_uring-5.19-2022-06-02' of git://git.kernel.dk/linux-block
git bisect bad 5ac8bdb9ad47334a9590e29daf7e4149b0a34729
# bad: [35b51afd23c98e2f055ac563aca36173a12588b9] Merge tag 'riscv-for-linus-5.19-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
git bisect bad 35b51afd23c98e2f055ac563aca36173a12588b9
# good: [c3a9a3c5f5590e85da15d6201e415ff636fe5670] Merge tag 'trace-tools-v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
git bisect good c3a9a3c5f5590e85da15d6201e415ff636fe5670
# bad: [1ff7bc3ba71d398d349c49103a3da34bb4ea02d1] Merge tag 'pm-5.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
git bisect bad 1ff7bc3ba71d398d349c49103a3da34bb4ea02d1
# good: [73d15ba6ba390caed47aa8885811d1cd7b4477f3] Merge tag 'mips_5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
git bisect good 73d15ba6ba390caed47aa8885811d1cd7b4477f3
# bad: [9f9c1f6844bdacb4a011cc69e19b929997038f4f] Merge branch 'pm-sysoff'
git bisect bad 9f9c1f6844bdacb4a011cc69e19b929997038f4f
# good: [22ffff6d21ebfcd6e722af5f6954ab97c726c3c8] Merge branch 'pm-opp'
git bisect good 22ffff6d21ebfcd6e722af5f6954ab97c726c3c8
# good: [9b0d0af145195cfd79210b805448a4bcc69f0e04] sh: Use do_kernel_power_off()
git bisect good 9b0d0af145195cfd79210b805448a4bcc69f0e04
# bad: [eae813b755c46c74d65f52fa6b0b1a5476e13551] soc/tegra: pmc: Use sys-off handler API to power off Nexus 7 properly
git bisect bad eae813b755c46c74d65f52fa6b0b1a5476e13551
# good: [bf8d73b934df8aa485dc4650d6d5dfe5a640af4b] memory: emif: Use kernel_can_power_off()
git bisect good bf8d73b934df8aa485dc4650d6d5dfe5a640af4b
# bad: [02a1124defc2571b81c054ae4c5481f1ac7ccf20] regulator: pfuze100: Use devm_register_sys_off_handler()
git bisect bad 02a1124defc2571b81c054ae4c5481f1ac7ccf20
# bad: [98f30d0ecf79da8cf17a171fa4cf6eda7ba4dd71] ACPI: power: Switch to sys-off handler API
git bisect bad 98f30d0ecf79da8cf17a171fa4cf6eda7ba4dd71
# first bad commit: [98f30d0ecf79da8cf17a171fa4cf6eda7ba4dd71] ACPI: power: Switch to sys-off handler API

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