From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Sune_M=F8lgaard?= Subject: Frequency scaling, Dell Inspiron 6000 Date: Sun, 29 Jul 2007 16:03:31 +0200 Message-ID: <46AC9E33.3020008@molgaard.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from cicero-fbr1.cybercity.dk ([212.242.40.5]:64037 "EHLO cicero-fbr1.cybercity.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762836AbXG2OqI (ORCPT ); Sun, 29 Jul 2007 10:46:08 -0400 Received: from cicero1.cybercity.dk (cicero1.cybercity.dk [212.242.40.4]) by cicero-fbr1.cybercity.dk (Postfix) with ESMTP id 576523E669C for ; Sun, 29 Jul 2007 16:05:35 +0200 (CEST) Received: from user3.cybercity.dk (user3.cybercity.dk [212.242.41.36]) by cicero1.cybercity.dk (Postfix) with ESMTP id 6E1E963EE58 for ; Sun, 29 Jul 2007 16:03:33 +0200 (CEST) Received: from [192.168.1.2] (0x55510b65.adsl.cybercity.dk [85.81.11.101]) by user3.cybercity.dk (Postfix) with ESMTP id 8DC992557D5 for ; Sun, 29 Jul 2007 16:03:32 +0200 (CEST) Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Around the time of 2.6.17, I noticed that this machine would no longer=20 scale it's frequency as it used to (i.e. it wouldn't at all, it would=20 before). Furthermore, It reported an internal temperature somewhat near= =20 10 centigrade higher than before, leading to increased fan noise. I am uncertain of whether it used to scale using the speedstep-centrino= =20 module or another one, but found a remark on google on a similar proble= m=20 stating that it appeared "...after speedstep-centrino had it's guts=20 ripped out in 2.6.18..." (cited from memory). The CPU of the machine is labeled as centrino compliant, but is in fact= =20 a Celeron-M, and hence does not support _Enhanced_ Speedstep. However, = I=20 clearly remember having frequency scaling working with Ubuntu kernel=20 2.6.15, but failing with Ubuntu 2.6.17 (possibly with some 2.6.18 code=20 backported). Venkatesh Pallipadi did some analysis of the BIOS, and posted a message= =20 to=20 http://www.dellcommunity.com/supportforums/board/message?board.id=3Dins= p_bios&thread.id=3D38979=20 , however no replies came forth. I am uncertain as to whether I upgrade= d=20 the kernel or the bios first, but I think it was kernel first. I am taking this matter up again, as I have given the machine to my gf,= =20 who complains about the fan noise, which I imagine will be less of a=20 problem, if the cpu is frequency scaled. I hope for anyone to take an interest and advise as to what info I=20 should provide. Best regards, Sune M=F8lgaard --=20 A motorcycle is a combination of pony, blow dryer, and vibrator -=20 perfect for girls of all ages. - Colin MacDonald - To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html