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b=e0aGeSalbH+B3CH20+MYPAoMfnCyfcP6fZFcto6Zbb8NoSPMH8illV+d5xvc/tW8NC6cbM18i20qokd8iQ0A54l3uwlxU7lom9ikgiQCeTUKNg1C6FfQLzrTjP7x5NPxq0apOfD5ktTHcWX9mv0CRrxSGpQB6nlhABQsVng0M/o= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from MN0PR12MB6101.namprd12.prod.outlook.com (2603:10b6:208:3cb::10) by PH7PR12MB6443.namprd12.prod.outlook.com (2603:10b6:510:1f9::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9228.16; Tue, 21 Oct 2025 14:29:20 +0000 Received: from MN0PR12MB6101.namprd12.prod.outlook.com ([fe80::37ee:a763:6d04:81ca]) by MN0PR12MB6101.namprd12.prod.outlook.com ([fe80::37ee:a763:6d04:81ca%7]) with mapi id 15.20.9228.016; Tue, 21 Oct 2025 14:29:20 +0000 Message-ID: Date: Tue, 21 Oct 2025 09:29:17 -0500 User-Agent: Mozilla Thunderbird Subject: Re: [REGRESSION][BISECTED] "Wakeup event detected during hibernation" on Dell Precision 7780 (was "[PATCH v4] PM: hibernate: Avoid missing wakeup events during hibernation") To: Askar Safin , chris.feng@mediatek.com, Andy Shevchenko Cc: chetan.kumar@mediatek.com, hua.yang@mediatek.com, len.brown@intel.com, liang.lu@mediatek.com, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, pavel@ucw.cz, rafael@kernel.org, stable@kernel.org, ting.wang@mediatek.com, regressions , DellClientKernel , Andy Shevchenko References: <20231213083251.186935-1-chris.feng@mediatek.com> <20251021125446.4384-1-safinaskar@gmail.com> Content-Language: en-US From: Mario Limonciello In-Reply-To: <20251021125446.4384-1-safinaskar@gmail.com> Content-Type: text/plain; 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Although the >> current hibernation framework will execute part of the recovery process >> after a wakeup event occurs, it ultimately performs a shutdown operation >> because the system does not check the return value of >> hibernation_platform_enter(). In short, if a wakeup event occurs before >> putting the system into the final low-power state, it will be missed. >> >> To solve this problem, check the return value of >> hibernation_platform_enter(). When it returns -EAGAIN or -EBUSY (indicate >> the occurrence of a wakeup event), execute the hibernation recovery >> process, discard the previously saved image, and ultimately return to the >> working state. > > #regzbot introduced: 0c4cae1bc00d31c78858c184ede351baea232bdb > > Hibernation doesn't work on my laptop. > > My laptop is Dell Precision 7780. > > Hibernation starts, then aborts. dmesg contains: > > [ 28.283320] PM: hibernation: Wakeup event detected during hibernation, rolling back. > > I did bisect. The bug reproduces starting with 0c4cae1bc00d. > > The bug still reproduces on v6.18-rc2. > > Note: there is another problem with PM on my laptop, which is tracked here: > https://lore.kernel.org/all/197ae95ffd8.dc819e60457077.7692120488609091556@zohomail.com/ . > > So I always revert 1796f808e4bb in my kernels. > > But this doesn't prevent this hibernation bug. > > In other words, this hibernation bug still happens on v6.18-rc2 even > with 1796f808e4bb reverted. > > Steps to reproduce: > 1. Power off laptop, then power on > 2. Hibernate ("sudo systemctl hibernate") > > Hibernate will not work. > > Note that to reproduce the bug you need power off laptop, and then power on > it in step 1. Merely reboot doesn't cause bug. I. e. reproducibilty > depends on whether last boot was reboot or cold power on. > > Also: suspend works normally (assuming I reverted 1796f808e4bb), but hibernate > doesn't. > > This is "dmesg --level=debug+" on v6.18-rc2-with-1796f808e4bb-reverted: > > https://zerobin.net/?0459f6411446622d#8i0Ifo6o68By3+UlYUr2t2KL7YLXsKEXrkfszpE77Rw= > > This is config of this kernel: > > https://zerobin.net/?04e89ceab8284c1d#9bpaZKqVXFSaeav/WW6GOCwD4i3SozzQ8pBEJ6LWwVM= > To me it sounds like it's potentially the same root cause for the early suspend wakeup as well as the hibernate wakeup. Assuming the GPIO pointed out in that other thread (https://lore.kernel.org/all/20250918183336.5633-1-safinaskar@gmail.com/) is indeed the touchpad GPIO I had a suspicion. Are you closing the lid and putting the laptop in a bag or putting anything on top of it? I wonder if the touchpad is not disabled by the hardware and getting pressure through the lid and physically clicking/activating. I've seen this exact issue occur on a Framework 16 as well. The workaround is to disable wakeup from touchpad before suspend/hibernate.