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From: Guenter Roeck <linux@roeck-us.net>
To: Shady Abu-Hussein <shady.abh@gmail.com>
Cc: "Pali Rohár" <pali@kernel.org>,
	linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] hwmon: (dell-smm) Add Dell Pro Precision 7 16 PW716260 to fan control whitelist
Date: Sat, 14 Nov 2026 08:54:39 -0800	[thread overview]
Message-ID: <996a06e5-3b2a-4cf7-aa27-49bfb896e725@roeck-us.net> (raw)
In-Reply-To: <20261112160447.136279-1-shady.abh@gmail.com>

On Thu, Nov 12, 2026 at 04:04:47PM +0000, Shady Abu-Hussein wrote:
> On the Dell Pro Precision 7 16 PW716260 the firmware fan control
> cannot be overridden using the default SMM method, writes to pwmX
> are ignored and pwmX_enable returns -EINVAL. The firmware AC fan
> policy also requests speeds below the minimum sustainable speed of
> the fans, so one fan repeatedly stops and restarts every few
> seconds at low load.
> 
> Add the machine to the fan control whitelist using the
> I8K_FAN_30A3_31A3 SMM codes. With this, writing 1 to pwm1_enable
> disables automatic fan control, the fans follow the requested
> state (0: off, 1: ~2500 RPM, 2: ~3950 RPM), and writing 2 to
> pwm1_enable restores automatic fan control.
> 
> Tested on BIOS 1.5.0 with kernel 7.2.15.
> 
> Signed-off-by: Shady Abu-Hussein <shady.abh@gmail.com>

Applied.

Thanks,
Guenter

      reply	other threads:[~2026-11-14 16:54 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20261111172707.84072-1-shady.abh@gmail.com>
2026-11-12 16:04 ` Shady Abu-Hussein
2026-11-14 16:54   ` Guenter Roeck [this message]

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