From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753826AbYIHN17 (ORCPT ); Mon, 8 Sep 2008 09:27:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751908AbYIHN1v (ORCPT ); Mon, 8 Sep 2008 09:27:51 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:55969 "EHLO gprs189-60.eurotel.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750871AbYIHN1u (ORCPT ); Mon, 8 Sep 2008 09:27:50 -0400 Date: Mon, 8 Sep 2008 15:29:12 +0200 From: Pavel Machek To: Theodore Tso , Henrique de Moraes Holschuh , kernel list Subject: Re: 2.6.26: thinkpad x60 is cooled passively Message-ID: <20080908132912.GB18486@elf.ucw.cz> References: <20080813080618.GA16061@elf.ucw.cz> <20080813152431.GD8232@mit.edu> <20080813203137.GB27546@khazad-dum.debian.net> <20080813204338.GA6142@mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080813204338.GA6142@mit.edu> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 2008-08-13 16:43:38, Theodore Tso wrote: > On Wed, Aug 13, 2008 at 05:31:37PM -0300, Henrique de Moraes Holschuh wrote: > > > know the fans have a tendency to go bad within 12-18 months, and so > > > the CPU heat sink and fan unit needs to be replaced perdiocially. > > > What does /proc/acpi/ibm/fan report? > > > > ThinkPad fans have a overdesign range of about 2x, they almost never stop > > because they're too old. Clogged in dirt, on the other hand... a clogged > > fan often spins FASTER and cools less. > > > > Want to see how much your fan has as far as a safety margin goes? use > > thinkpad-acpi to measure RPMs in level 7 and also when you switch PWM off > > (i.e. set it to 100% duty cycle). Mine gets faster by 1500RPM or so that > > reflects the extra torque the EC can apply to get the fan to run at the > > speed it wants it to. > > Hmm, maybe I've just had bad luck, or I live in a very dusty > environment (four cats, including two longhairs in perma-shed mode, > will do that to any house), but I've had at least 3 fan failures in > the past 5-6 years where the fan stopped entirely, and had to be > replaced. When I took it out, it was quite dirty, but the way it spun > why I tried moving the fan blades with my finger, it felt just like > the failure modes I've had with standard power supply fans that have > gone bad due to old age. Okay, seems like vojtech fixed my notebook with a bit of compressed air... a lot of dust came out, and machine works okay now. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html