From: sashiko-bot@kernel.org
To: "Emanuel Ávila" <avilaemanueel@gmail.com>
Cc: linux-hwmon@vger.kernel.org
Subject: Re: [PATCH] hwmon: (dell-smm) Add Dell 16 DC16250 to fan control whitelist
Date: Thu, 24 Sep 2026 04:51:16 +0000 [thread overview]
Message-ID: <20260924045117.7530A1F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260924044829.2889204-1-avilaemanueel@gmail.com>
> On the Dell 16 DC16250, the BIOS keeps the CPU fan at its highest state
> (~4700 RPM) even when the system is idle at 45 °C, and fan speed writes
> through pwm1 are overridden by the BIOS within a few seconds.
>
> The I8K_FAN_30A3_31A3 SMM code pair works on this machine through the
> WMI-SMM backend: after writing 1 to pwm1_enable, the fan accepts all
> three fan states (0, 128 and 255 via pwm1) and reports matching RPM,
> and writing 2 hands control back to the BIOS.
>
> Tested on BIOS 1.8.1 with kernel 7.1.5 (Pop!_OS 24.04).
>
> Assisted-by: claude-opus-5-5
> Signed-off-by: Emanuel Ávila <avilaemanueel@gmail.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260924044829.2889204-1-avilaemanueel@gmail.com?part=1
next prev parent reply other threads:[~2026-09-24 4:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-24 4:48 [PATCH] hwmon: (dell-smm) Add Dell 16 DC16250 to fan control whitelist Emanuel Ávila
2026-09-24 4:51 ` sashiko-bot [this message]
2026-09-24 8:11 ` Pali Rohár
2026-09-24 16:49 ` Guenter Roeck
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