Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261871AbVASUUM (ORCPT ); Wed, 19 Jan 2005 15:20:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261872AbVASUUM (ORCPT ); Wed, 19 Jan 2005 15:20:12 -0500 Received: from modemcable240.48-200-24.mc.videotron.ca ([24.200.48.240]:43648 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S261871AbVASUUD (ORCPT ); Wed, 19 Jan 2005 15:20:03 -0500 Date: Wed, 19 Jan 2005 15:19:16 -0500 (EST) From: Nicolas Pitre X-X-Sender: nico@localhost.localdomain To: LM Sensors , LKML cc: Jean Delvare , Jonas Munsin , Simone Piunno , djg@pdp8.net, greg@kroah.com Subject: Re: 2.6.10-mm2: it87 sensor driver stops CPU fan In-Reply-To: <20050110203427.5061cf0d.khali@linux-fr.org> Message-ID: References: <200501080150.44653.pioppo@ferrara.linux.it> <20050108172020.64999e50.khali@linux-fr.org> <200501082023.54881.pioppo@ferrara.linux.it> <200501102023.44847.pioppo@ferrara.linux.it> <20050110203427.5061cf0d.khali@linux-fr.org> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="8323328-1996361894-1106165218=:5315" Content-ID: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1718 Lines: 40 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323328-1996361894-1106165218=:5315 Content-Type: TEXT/PLAIN; CHARSET=iso-8859-1 Content-Transfer-Encoding: 8BIT Content-ID: On Mon, 10 Jan 2005, Jean Delvare wrote: > When I get this, I'll compare with the datasheets so as to understand > how your chip is configured (or left unconfigured) by your BIOS. This > will both help me propose a workaround in the it87 driver and explain > the Gigabyte support what I think they should do. FWIW, I have a Gigabyte motherboard with an it87 chip too. Reading about this it87 polarity thing I'm suspecting something is really wrong here: When system is idle, the sensors report shows: CPU temp = +25?C and CPU fan = 2136 RPM (and rather noisy) When system is 100% busy (with dd if=/dev/urandom of=/dev/null): CPU temp = +41?C and CPU fan = 1288 RPM (and obviously much quieter) I'm running a 2.6.10 kernel (not -mm) so I guess the BIOS settings for fan control are not altered. And incidentally the BIOS has a setting called "smart fan control" set to "enabled" which maps to the ITxxF automatic PWM control mode I suppose. So if the BIOS actually set the fan polarity wrong then the fan would slow down when the temperature rises and vice versa, right? Nicolas --8323328-1996361894-1106165218=:5315-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/