Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261929AbVASWPY (ORCPT ); Wed, 19 Jan 2005 17:15:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261925AbVASWPX (ORCPT ); Wed, 19 Jan 2005 17:15:23 -0500 Received: from modemcable240.48-200-24.mc.videotron.ca ([24.200.48.240]:24705 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S261937AbVASWLN (ORCPT ); Wed, 19 Jan 2005 17:11:13 -0500 Date: Wed, 19 Jan 2005 17:10:47 -0500 (EST) From: Nicolas Pitre X-X-Sender: nico@localhost.localdomain To: LM Sensors , LKML cc: Jonas Munsin , Simone Piunno , Greg KH Subject: Re: 2.6.10-mm2: it87 sensor driver stops CPU fan In-Reply-To: <20050119215209.77950499.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> <20050119215209.77950499.khali@linux-fr.org> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="8323328-1369728004-1106172647=:5315" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4148 Lines: 101 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323328-1369728004-1106172647=:5315 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT On Wed, 19 Jan 2005, Jean Delvare wrote: > Hi Nicolas, > > > 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? > > That's right, what you describe really sounds like a wrong polarity > setting. > > Could you please tell us what model it is, with what BIOS revision? >From dmidecode: BIOS Information Vendor: Award Software International, Inc. Version: F5 Release Date: 11/01/2004 Base Board Information Manufacturer: Gigabyte Technology Co., Ltd. Product Name: 8I915GMF Version: x.x Serial Number: > I would also appreciate a dump of the chip (isadump 0x295 0x296 unless > it lives at some uncommon address) to confirm the guess. 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: 11 10 80 00 37 ff 00 37 ff 07 13 5b 00 51 40 ff 10: fe fe ff 71 d7 fe 7f fe 00 00 ff ff ff ff ff ff 20: 53 a4 cc b9 b9 89 8b ff c9 c9 fe 19 60 f7 f7 f7 30: ff 00 ff 00 ff 00 ff 00 ff 00 ff 00 ff 00 ff 00 40: 7f 7f 7f 7f 46 7f ff ff 2d ff ff ff ff ff ff ff 50: ff 1c 7f 7f 7f ff 5f 5f 90 5f f9 12 55 00 00 00 60: ff 14 41 23 82 23 ff ff 7f 7f 7f 00 00 7f ff ff 70: ff 14 41 23 82 23 ff ff ff ff ff ff ff ff ff ff 80: 00 00 00 00 ff ff ff ff 40 40 ff ff ff ff ff ff 90: 7f 7f 7f 00 00 7f ff ff 7f 7f 7f 00 00 7f ff ff a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > The code Jonas and I have been adding to the it87 driver recently will > probably not work for you if you leave the "smart fan control" enabled > in your BIOS setup screen (because we supposed that no reponsible > motherboard maker would enable this mode without properly configuring > the polarity beforehand - wrong guess in your case - and are not > allowing a polarity inversion in this case). Heh... and it's the default value. > However, by disabling this > mode in the BIOS setup screen, you should be able to use the new > fix_pwm_polarity module register to get the polarity fixed, with manual > PWM control (no auto mode yet). I guess the BIOS setting will simply be overwritten so changing the BIOS should not affect subsequent use, no? > You might also search for a BIOS update for your board. I consider the > behavior your describe a major problem and would expect Gigabyte to fix > it at some point in time. Well... I can't find a straight BIOS update for this board. There is a Windows application to fetch and install a new BIOS from the net but installing Windows on this machine just for that is not really practical. Nicolas --8323328-1369728004-1106172647=: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/