linux-kernel - Re: [REGRESSION][BISECTED] "Wakeup event detected during hibernation" on Dell Precision 7780 (was "[PATCH v4] PM: hibernate: Avoid missing wakeup events during hibernation")

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Message-ID: <CAPnZJGB2YAx03piGMLE=wLOQU9-gCpSdFZhBE5iECkDxwzYCFQ@mail.gmail.com>
Date: Tue, 9 Dec 2025 09:02:59 +0300
From: Askar Safin <safinaskar@...il.com>
To: Mario Limonciello <mario.limonciello@....com>
Cc: chris.feng@...iatek.com, 
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, chetan.kumar@...iatek.com, 
	hua.yang@...iatek.com, len.brown@...el.com, liang.lu@...iatek.com, 
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, pavel@....cz, 
	rafael@...nel.org, stable@...nel.org, ting.wang@...iatek.com, 
	regressions <regressions@...ts.linux.dev>, 
	DellClientKernel <Dell.Client.Kernel@...l.com>
Subject: Re: [REGRESSION][BISECTED] "Wakeup event detected during hibernation"
 on Dell Precision 7780 (was "[PATCH v4] PM: hibernate: Avoid missing wakeup
 events during hibernation")

On Tue, Oct 21, 2025 at 5:29 PM Mario Limonciello
<mario.limonciello@....com> wrote:
> To me it sounds like it's potentially the same root cause for the early
> suspend wakeup as well as the hibernate wakeup.

Adding "gpiolib_acpi.ignore_wake=VEN_0488:00@355" or
"gpiolib_acpi.ignore_wake=INTC1085:00@355"
doesn't fix this bug.

> Are you closing the lid
> and putting the laptop in a bag or putting anything on top of it?

No. I just click "Hibernate" button using touchpad in GUI, and hibernate fails.

I just did some printf-debugging. Results:

We call
https://elixir.bootlin.com/linux/v6.18/source/kernel/power/hibernate.c#L870 ,
it calls
https://elixir.bootlin.com/linux/v6.18/source/kernel/power/hibernate.c#L723 ,
it calls
https://elixir.bootlin.com/linux/v6.18/source/kernel/power/hibernate.c#L636 ,
it calls dpm_suspend
https://elixir.bootlin.com/linux/v6.18/source/drivers/base/power/main.c#L2265 ,
that dpm_suspend returns error, and this error leads to
"Wakeup event detected during hibernation" message.

Any further pointers? How to debug?

-- 
Askar Safin