Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267401AbUJGLLl (ORCPT ); Thu, 7 Oct 2004 07:11:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267391AbUJGLLl (ORCPT ); Thu, 7 Oct 2004 07:11:41 -0400 Received: from main.gmane.org ([80.91.229.2]:17048 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S269793AbUJGLKo (ORCPT ); Thu, 7 Oct 2004 07:10:44 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: =?iso-8859-1?q?M=E5ns_Rullg=E5rd?= Subject: Re: High pitched noise from laptop: processor.c in linux 2.6 Date: Thu, 07 Oct 2004 12:53:00 +0200 Message-ID: References: <41650CAF.1040901@unimail.com.au> <20041007103210.GA32260@atrey.karlin.mff.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 197.80-202-92.nextgentel.com User-Agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Security Through Obscurity, linux) Cancel-Lock: sha1:3sxVONCGlUTwbrwK/WhUi7Ktflw= Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1310 Lines: 35 Pavel Machek writes: > Hi! > >> 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. > > Change #define HZ 1000 to #define HZ 100... ... and lose all the benefits of HZ=1000. What would happen if one were to set HZ to a higher value, like 10000? > Ouch and btw it is hardware problem -- too cheap capacitors. > Pavel > -- > Boycott Kodak -- for their patent abuse against Java. Actually, I don't know which is worse, patent abuse or Java misuse. -- M?ns Rullg?rd mru@mru.ath.cx - 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/