Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753726Ab0AYWib (ORCPT ); Mon, 25 Jan 2010 17:38:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751368Ab0AYWia (ORCPT ); Mon, 25 Jan 2010 17:38:30 -0500 Received: from silver.sucs.swan.ac.uk ([137.44.10.1]:51269 "EHLO silver.sucs.swan.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932131Ab0AYWia (ORCPT ); Mon, 25 Jan 2010 17:38:30 -0500 Date: Mon, 25 Jan 2010 22:38:16 +0000 From: Sitsofe Wheeler To: Justin Piszcz Cc: Ian Campbell , Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org Subject: Re: High pitch noise when ACPI processor module is loaded. Message-ID: <20100125223816.GA16685@sucs.org> References: <9883.1264397678@localhost> <1264414241.16526.84480.camel@zakaz.uk.xensource.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 840 Lines: 19 On Mon, Jan 25, 2010 at 03:46:06PM -0500, Justin Piszcz wrote: > > It would be nice if it were possible to find out what is causing it exactly > in the acpi cpufreq module, as this problem does not occur in Windows 7 and > I can achieve 3.6GHz in Windows 7 w/out any high pitch noise. That may well be related to the interrupt frequency the kernel is running with. I remember reading that a lower HZ were less likely to cause chip whine on some machines... http://www.thinkwiki.org/wiki/Problem_with_high_pitch_noises#Change_the_timer_interrupt_frequency -- Sitsofe | http://sucs.org/~sits/ -- 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/