linux-kernel - Re: [PATCH v2 6/6] platform/x86: ayaneo-ec: Add suspend hook

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Message-ID: <000cd38e-7052-4987-b5bc-b8de176363cf@kernel.org>
Date: Tue, 28 Oct 2025 16:21:41 -0500
From: Mario Limonciello <superm1@...nel.org>
To: Antheas Kapenekakis <lkml@...heas.dev>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hwmon@...r.kernel.org, Hans de Goede <hansg@...nel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 Derek John Clark <derekjohn.clark@...il.com>,
 Joaquín Ignacio Aramendía <samsagax@...il.com>,
 Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH v2 6/6] platform/x86: ayaneo-ec: Add suspend hook

On 10/28/25 3:34 PM, Antheas Kapenekakis wrote:
>>> The fan speed is also lost during hibernation, but since hibernation
>>> failures are common with this class of devices
Why are hibernation failures more common in this class of device than 
anything else?  The hibernation flow is nearly all done in Linux driver 
code (with the exception of ACPI calls that move devices into D3 and out 
of D0).

Perhaps you're seeing a manifestation of a general issue that we're 
working on a solution for here:

https://lore.kernel.org/linux-pm/20251025050812.421905-1-safinaskar@gmail.com/

https://lore.kernel.org/linux-pm/20251026033115.436448-1-superm1@kernel.org/

https://lore.kernel.org/linux-pm/5935682.DvuYhMxLoT@rafael.j.wysocki/T/#u

Or if you're on an older kernel and using hybrid sleep we had a generic 
issue there as well which was fixed in 6.18-rc1.

Nonetheless; don't make policy decisions based upon kernel bugs.  Fix 
the kernel bugs.