From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=35.89.44.35 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794675281; b=KVKDGl2mb2gT+jRM+9zyS5utiMYDL9JOypP7hdsk40CpOCXPZg2MUUXFzUOHxYbs63Z7 1njM/ijO052NJzhM/tnlI/AUwPiOBganwK6i1qlAsknTVbcSRMx2Tgy0V9EWusaYvtfDa u2AJHHGfCwwr6V23mI4UyEi7ltaoFSnLVaq1Wa9TIQUHwnuH7X1uOSVQOvMmxbmh18ExX bXGuPDdzcedylqouN++UNUsZr14K+ocQPw7ovaNr7A9gqW67LOLra1G6XWGwmWSpyh124 xb5BZ1vywh7QHIyHsdlF4rBBGpyQz1kiIGTgruoZgm/9SNj6/cXtdzBYljEQsjPVmqg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794675281; h=DMARC-Filter:Received:Received:X-Authority-Analysis:DKIM-Signature: Received:Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To:X-AntiAbuse:X-AntiAbuse: X-AntiAbuse:X-AntiAbuse:X-AntiAbuse:X-BWhitelist:X-Source-IP: X-Source-L:X-Exim-ID:X-Source:X-Source-Args:X-Source-Dir: X-Source-Sender:X-Source-Auth:X-Email-Count:X-Org:X-Source-Cap: X-Local-Domain:X-CMAE-Envelope; bh=n5UsVPtZvhQiUvUeNRBWwsmppzZEReyOurASB6aSeh8=; b=bjhUSeg71cdbNIse8ixKOUEsytJvMtnvV2Qp4UXqCQuhV+8Gt8XzBybQBrkCiNMrnIdv rmNyj6xNbJ4mJRV1dRHqaCuOrhBFJdu0/Z9TTJQI7ch/dlvSo3q2P9HqmPhBKoQBgfHA2 5SYwgy+0rTHtT+O4e3yUGhiHVat4TgrKGlOE7eEXljEJpAorOL6oWRZcNB8ChIiiJgsmO FQgmGmcKcl8YG6u9EdmDhQDUBjHnj17EdyXAqk7rZ9hIpdxS6lLfJ4XprMGe8GgtbYycL orWJ6Ipc7BaXPskti4Q6uCWUXaogZ1pHxs25xirbUZOig/MnBE6sqVrusr4kRpwBruA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=roeck-us.net; spf=fail smtp.mailfrom=roeck-us.net; dkim=pass header.d=roeck-us.net header.i=@roeck-us.net header.a=rsa-sha256 header.s=default header.b=Mhn270Wx; arc=none smtp.remote-ip=35.89.44.35 Received: from omta36.uswest2.a.cloudfilter.net (omta36.uswest2.a.cloudfilter.net [35.89.44.35]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14E0E606A32E for ; Sat, 14 Nov 2026 16:54:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 14E0E606A32E Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=roeck-us.net Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=roeck-us.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=roeck-us.net header.i=@roeck-us.net header.a=rsa-sha256 header.s=default header.b=Mhn270Wx Received: from eig-obgw-5003b.ext.cloudfilter.net ([10.0.29.155]) by cmsmtp with ESMTPS id SBUKxGIrKRiNxSH1UxCKrP; Sat, 14 Nov 2026 16:54:40 +0000 Received: from 162-215-252-36.unifiedlayer.com ([208.91.199.152]) by cmsmtp with ESMTPS id SH1UxzxjdSgq1SH1UxTxna; Sat, 14 Nov 2026 16:54:40 +0000 X-Authority-Analysis: v=2.4 cv=c8KrQQ9l c=1 sm=1 tr=0 ts=6af89250 a=QNED+QcLUkoL9qulTODnwA==:117 a=2cfIYNtKkjgZNaOwnGXpGw==:17 a=kj9zAlcOel0A:10 a=zJRp6_cAMcgA:10 a=M0FbrtG7MMAA:10 a=pGLkceISAAAA:8 a=CTxgCXsYzwGYwadptLEA:9 a=CjuIK1q_8ugA:10 a=ZXulRonScM0A:10 a=KPbNTLLc3YvdawN95zVk:22 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=roeck-us.net; s=default; h=In-Reply-To:Content-Type:MIME-Version:References :Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding :Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Unsubscribe-Post:List-Subscribe:List-Post:List-Owner:List-Archive; bh=n5UsVPtZvhQiUvUeNRBWwsmppzZEReyOurASB6aSeh8=; b=Mhn270WxrsvwR0XKkiCAka/6g0 8RYgA4rLnAH4/dcm6iIHaDYcqOoF+DAIWqGXUji8+ajq4FHCLkmIRSGevPO32b5FC+yZ5t3Lmo+Hj VjXOIA2nRU3ARhjjZV53jSFXVgVagKSOYYz6DwcvXE6WLks7mhx1yvU+rFeHfPcjTCpu9Rf1f8Jz9 Y+iX1ttgu0B5BYC/jN3cxRL2PZlG+djFRuvnimPlugzxCPdTgWSUvODGTOSPemBY9ZEzCdebpRK4p ixRghwxFvbdTZwoSmmMHEsF8vIuOhmkia2zksl1r+eaWw30UWo6UU1gRK12I/6CesDrSsBxFy6SZ8 6U4UrUEw==; Received: from 108-223-40-66.lightspeed.sntcca.sbcglobal.net ([108.223.40.66]:41990 helo=server.roeck-us.net) by bh-25.webhostbox.net with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.100.1) (envelope-from ) id 1xSH1T-00000000Pyj-3jJB; Sat, 14 Nov 2026 22:24:39 +0530 Date: Sat, 14 Nov 2026 08:54:39 -0800 From: Guenter Roeck To: Shady Abu-Hussein Cc: Pali =?iso-8859-1?Q?Roh=E1r?= , 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 Message-ID: <996a06e5-3b2a-4cf7-aa27-49bfb896e725@roeck-us.net> References: <20261111172707.84072-1-shady.abh@gmail.com> <20261112160447.136279-1-shady.abh@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261112160447.136279-1-shady.abh@gmail.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-BWhitelist: no X-Source-IP: 108.223.40.66 X-Source-L: No X-Exim-ID: 1xSH1T-00000000Pyj-3jJB X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 108-223-40-66.lightspeed.sntcca.sbcglobal.net (server.roeck-us.net) [108.223.40.66]:41990 X-Source-Auth: guenter@roeck-us.net X-Email-Count: 143 X-Org: HG=direseller_whb_net_legacy;ORG=directi; X-Source-Cap: cm9lY2s7YWN0aXZzdG07YmgtMjUud2ViaG9zdGJveC5uZXQ= X-Local-Domain: yes X-CMAE-Envelope: MS4xfAXb/Xq5lYoKGubvho6chDBJvfKcipmY6Q0iswXjEpyfPHrH1yayEmCnHu4cYTY70XrdNWGBqawZnf/kHQJtjYTjxvboSclnUgF21sFh85w3M9iH8BUB uFmAcHadCkMo7HJ0MMwy5e1jqj6+/ZC78c5pnOHb/pQUGTpSiZRVUbfoWUeJ4m8sS+5E5sL0PfEcXHeLVd/93kYnZPdBXCdlLcM9noyupDrHz+l8/WHv7Vfj 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 Applied. Thanks, Guenter