From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264332AbTLETJg (ORCPT ); Fri, 5 Dec 2003 14:09:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264334AbTLETJg (ORCPT ); Fri, 5 Dec 2003 14:09:36 -0500 Received: from courrier3.usherbrooke.ca ([132.210.13.19]:57825 "EHLO courrier3.usherbrooke.ca") by vger.kernel.org with ESMTP id S264332AbTLETJc (ORCPT ); Fri, 5 Dec 2003 14:09:32 -0500 Subject: RE: High-pitch noise with 2.6.0-test11 From: Jean-Marc Valin To: "Grover, Andrew" Cc: Troels Walsted Hansen , Linux Kernel In-Reply-To: References: Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-3Kaf//g8ujFKFCAB47dW" Organization: Universite de Sherbrooke Message-Id: <1070651354.4204.1.camel@idefix.homelinux.org> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-7) Date: Fri, 05 Dec 2003 14:09:14 -0500 X-UdeS-MailScanner-Information: Veuillez consulter le http://www.usherbrooke.ca/vers/virus-courriel X-UdeS-MailScanner: Aucun code suspect =?ISO-8859-1?Q?d=E9tect=E9?= X-MailScanner-SpamCheck: n'est pas un polluriel, SpamAssassin (score=-4.9, requis 5, BAYES_00 -4.90) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-3Kaf//g8ujFKFCAB47dW Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable > Here's the answer from another thread: >=20 > "It's not normal, but it means they used cheap capacitors. This is known > as the acoustic noise issue. It's related to PCB vibration as a result > of the piezo electric effect on the caps. What is the timer tick > frequency? ... The 1ms gives a nice 1kHz tone. It's related to the > voltage change of C4 exit." Well, that still doesn't explain why the noise is only there when I insert thermal.o. Also, the noise seems to be higher than 1 kHz (I'd guess 5-10 kHz). Jean-Marc --=20 Jean-Marc Valin, M.Sc.A., ing. jr. LABORIUS (http://www.gel.usherb.ca/laborius) Universit=E9 de Sherbrooke, Qu=E9bec, Canada --=-3Kaf//g8ujFKFCAB47dW Content-Type: application/pgp-signature; name=signature.asc Content-Description: Ceci est une partie de message =?ISO-8859-1?Q?num=E9riquement?= =?ISO-8859-1?Q?_sign=E9e=2E?= -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQA/0NfYdXwABdFiRMQRAvbfAJ9im2OvjURcvxolDMR3enxYHmKbowCcCPe8 RslqP3adGArtsWDrHlFVjHM= =8Ar0 -----END PGP SIGNATURE----- --=-3Kaf//g8ujFKFCAB47dW--