From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754042AbYHMUbv (ORCPT ); Wed, 13 Aug 2008 16:31:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752006AbYHMUbn (ORCPT ); Wed, 13 Aug 2008 16:31:43 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:60667 "EHLO gprs189-60.eurotel.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751896AbYHMUbm (ORCPT ); Wed, 13 Aug 2008 16:31:42 -0400 Date: Wed, 13 Aug 2008 22:32:59 +0200 From: Pavel Machek To: Theodore Tso , kernel list Subject: Re: 2.6.26: thinkpad x60 is cooled passively Message-ID: <20080813203259.GD8861@elf.ucw.cz> References: <20080813080618.GA16061@elf.ucw.cz> <20080813152431.GD8232@mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080813152431.GD8232@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 11:24:31, Theodore Tso wrote: > On Wed, Aug 13, 2008 at 10:06:18AM +0200, Pavel Machek wrote: > > While verifying that -rc2 regression is gone, I noticed alarming > > stuff: > > > > 1) thinkpad x60 relies on passive cooling. You have nice 1.8GHz cpu, > > which goes away as soon as you load it. > > > > 2) after some time it decides that 100% cpu in 1.0GHz is fine for you, > > and it takes quite long to recover. > > There is no fan in the X60? I didn't think that was the case. I do > 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? 3700 on level 7, more (like 4700) on disengaged, but still not enough to keep it from going to 1GHz. > Or are you saying that the fan isn't keeping keeping up with the heat > output of the CPU? Are you sure this isn't due to a hardware > problem? Yes, I'm trying to say that the fan isn't keeping keeping up with the heat output of the CPU. > As mentioned previously on this list, Lenovo has had a relatively bad > track record with fan failures and with incompetent installation of > the heat sink with bad applications of the thermal compound; it's the > one failings of an otherwise very nice laptop design. Hmm, ok, maybe. It is true that nearby X60p behaved slightly differently. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html