From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756725AbYHNApn (ORCPT ); Wed, 13 Aug 2008 20:45:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751565AbYHNApg (ORCPT ); Wed, 13 Aug 2008 20:45:36 -0400 Received: from gw.goop.org ([64.81.55.164]:46466 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751468AbYHNApf (ORCPT ); Wed, 13 Aug 2008 20:45:35 -0400 Message-ID: <48A38013.5020307@goop.org> Date: Wed, 13 Aug 2008 17:45:07 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: Henrique de Moraes Holschuh CC: Theodore Tso , Pavel Machek , kernel list Subject: Re: 2.6.26: thinkpad x60 is cooled passively References: <20080813080618.GA16061@elf.ucw.cz> <20080813152431.GD8232@mit.edu> <20080813203137.GB27546@khazad-dum.debian.net> In-Reply-To: <20080813203137.GB27546@khazad-dum.debian.net> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Henrique de Moraes Holschuh wrote: > 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. > > But the thermal sink interface to the CPU and GPU are sometimes crap [when > compared with the quality of the rest of the machine]. Open it, remove the > crap, and replace it with a very high quality compound. Dependin on > ThinkPad model, you also need to repair thermal sink design defects to make > it fit properly (read: press really tightly) on all chips. Yes, this seems like a widespread and chronic problem with these little Thinkpads. I've had both an X31 and X60 go bad this way, and a friend has had his X60 fail twice. A pity given how nice the rest of the machine is. J