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: <d06be6c6-f5b7-4259-b76a-20dc52a5ffd3@amd.com>
Date: Tue, 9 Dec 2025 21:42:21 -0600
From: Mario Limonciello <mario.limonciello@....com>
To: Askar Safin <safinaskar@...il.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 12/9/2025 12:02 AM, Askar Safin wrote:
> 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.
> 

Can you try using command line instead in case it's actually the 
touchpad click still being registered?

> 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?
> 

If you haven't already; turn on /sys/power/pm_debug_messages and 
/sys/power/pm_print_times.

This should help clarify the last functions that are run and any debug 
level PM related messages that are emitted that lead to the failure.

You can also check /sys/power/pm_wakeup_irq after the failure to confirm 
which interrupt woke the system (assuming that was the source of the 
early wakeup event).