linux-kernel - Re: regression, 5.19.0-rc1 not powering off when hibernated

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Date:   Thu, 16 Jun 2022 17:59:10 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Ken Moffat <zarniwhoop@...world.com>,
        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>
Subject: Re: regression, 5.19.0-rc1 not powering off when hibernated

Hi,

On 6/15/22 22:52, Ken Moffat wrote:
> On Wed, Jun 15, 2022 at 05:40:46PM +0100, Ken Moffat wrote:
>> On Mon, Jun 13, 2022 at 08:46:22PM +0100, Ken Moffat wrote:
>>
>>>>>> 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 ?
>>>>>
> [...]
>> 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.
>>
> It occurs to me that maybe I'm missing something in my .config.
> Since that is 117K, here is the gzipped config from the version that
> git blamed (apart from not powering off, it appears to work ok).

The patch below likely should fix the problem, please give it a try on
top of the 5.19-rc2.

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 20a66bf9f465..89c71fce225d 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -665,7 +665,7 @@ static void power_down(void)
 		hibernation_platform_enter();
 		fallthrough;
 	case HIBERNATION_SHUTDOWN:
-		if (pm_power_off)
+		if (kernel_can_power_off())
 			kernel_power_off();
 		break;
 	}