From owner-freebsd-mobile@FreeBSD.ORG Wed Dec 21 10:09:58 2005 Return-Path: X-Original-To: mobile@freebsd.org Delivered-To: freebsd-mobile@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2B19516A41F; Wed, 21 Dec 2005 10:09:58 +0000 (GMT) (envelope-from roth@droopy.unibe.ch) Received: from mailhub03.unibe.ch (mailhub03.unibe.ch [130.92.9.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8C7A643D5E; Wed, 21 Dec 2005 10:09:57 +0000 (GMT) (envelope-from roth@droopy.unibe.ch) Received: from localhost (scanhub01-eth0.unibe.ch [130.92.254.65]) by mailhub03.unibe.ch (Postfix) with ESMTP id 8B373257A4; Wed, 21 Dec 2005 11:09:55 +0100 (CET) Received: from mailhub03.unibe.ch ([130.92.9.70]) by localhost (scanhub01.unibe.ch [130.92.254.65]) (amavisd-new, port 10024) with LMTP id 12508-07-63; Wed, 21 Dec 2005 11:09:53 +0100 (CET) Received: from asterix.unibe.ch (asterix.unibe.ch [130.92.64.4]) by mailhub03.unibe.ch (Postfix) with ESMTP id DFD3925526; Wed, 21 Dec 2005 11:09:53 +0100 (CET) Received: from droopy.unibe.ch (droopy [130.92.64.20]) by asterix.unibe.ch (8.12.10+Sun/8.12.10) with ESMTP id jBLA9s8Z027049; Wed, 21 Dec 2005 11:09:54 +0100 (MET) Received: (from roth@localhost) by droopy.unibe.ch (8.12.10+Sun/8.12.9/Submit) id jBLA9sPY024485; Wed, 21 Dec 2005 11:09:54 +0100 (MET) Date: Wed, 21 Dec 2005 11:09:54 +0100 From: Tobias Roth To: current@freebsd.org, mobile@freebsd.org Message-ID: <20051221100954.GB24363@droopy.unibe.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4i X-message-flag: Warning! Using Outlook is insecure and promotes virus distribution. Please use a different email client. X-Virus-checked: by University of Berne Cc: Subject: IBM Thinkpad Fan Control (acpi_ibm) X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Dec 2005 10:09:58 -0000 Hi With acpi_ibm.ko, I can monitor fan speed, thermal sensors and do many other nice things. However, my Thinkpad (a T43p) has an awfully noisy fan, that, once the notebook reaches its standard working temperature (around 45 deg C), turns on and never stops again. The generally accepted solution his to manually lower the fan speed and live with the higher temperatures, which will still be in an acceptable range even with slow running fans. The discussion and a utility for Windows can be found here [1], and a linux tool is described here [2]. Now my question. Since acpi_ibm.ko can already read temperature sensors and fan speed, would it be feasable to teach it to control fan speed as well? Is anyone working on it already? Or can someone outline the steps that have to be taken so I can take a look and see if I can do it myself? thanks, t.