Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269769AbUJGJcL (ORCPT ); Thu, 7 Oct 2004 05:32:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269766AbUJGJbm (ORCPT ); Thu, 7 Oct 2004 05:31:42 -0400 Received: from mailhub2.uq.edu.au ([130.102.149.128]:263 "EHLO mailhub2.uq.edu.au") by vger.kernel.org with ESMTP id S269769AbUJGJbD (ORCPT ); Thu, 7 Oct 2004 05:31:03 -0400 Message-ID: <41650CAF.1040901@unimail.com.au> Date: Thu, 07 Oct 2004 19:30:23 +1000 From: Fraz User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20040913 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: High pitched noise from laptop: processor.c in linux 2.6 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1003 Lines: 29 I recently upgraded from linux 2.4.27 to 2.6.8.1 and noticed my laptop now makes a high pitch noise while idle. I traced it back to the processor module for acpi. 'rmmod processor' stops the noise. Using speed step to turn it down to 733 Mhz makes it a little quieter and doesn't change the tone. Is there any way to stop this? I googled around and found it had something to do with idle frequency of 1000 Hz in 2.6 instead of 100Hz in the 2.4 kernel. I couldn't find much else on this. Hunting around the code didn't help much, I don't know C. The laptop is a Compaq Evo N160 from Dec 2001. The reference in google was to a Centrino laptop with the same problem. I wrote to Dominik Brodowski who suggested posting here. fraz - 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/