From: sashiko-bot@kernel.org
To: "Patrick Pepin" <patpep@me.com>
Cc: linux-hwmon@vger.kernel.org
Subject: Re: [PATCH v2] hwmon: (dell-smm) Add Dell Precision 3650 Tower to fan control whitelist
Date: Mon, 14 Sep 2026 08:20:16 +0000 [thread overview]
Message-ID: <20260914082017.46E721F0089E@smtp.kernel.org> (raw)
In-Reply-To: <20260914080955.87925-1-patpep@me.com>
> On the Dell Precision 3650 Tower, the EC ignores fan speed writes unless
> automatic BIOS fan control is disabled first. The I8K_FAN_30A3_31A3 SMM
> code pair works on this machine through the WMI-SMM backend: after
> writing 1 to pwm1_enable, all three fans (CPU, front, top) accept the
> three fan states and report matching RPM, and writing 2 hands control
> back to the BIOS. I8K_FAN_34A3_35A3 was tested as well and also works;
> I8K_FAN_30A3_31A3 is used since it matches recent OEM software.
>
> Tested on BIOS 1.48.0 with kernels 7.0.0-30 and 7.0.0-31 (Ubuntu 26.04).
>
> Signed-off-by: Patrick Pepin <patpep@me.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260914080955.87925-1-patpep@me.com?part=1
next prev parent reply other threads:[~2026-09-14 8:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-13 11:29 [PATCH] hwmon: (dell-smm) Add Dell Precision 3650 Tower to fan control whitelist Patrick Pepin
2026-09-13 11:32 ` sashiko-bot
2026-09-13 11:35 ` Pali Rohár
2026-09-13 20:16 ` Armin Wolf
2026-09-14 8:09 ` [PATCH v2] " Patrick Pepin
2026-09-14 8:20 ` sashiko-bot [this message]
2026-09-14 9:46 ` Pali Rohár
2026-09-16 14:53 ` Guenter Roeck
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