Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932748AbWLSKGw (ORCPT ); Tue, 19 Dec 2006 05:06:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932749AbWLSKGw (ORCPT ); Tue, 19 Dec 2006 05:06:52 -0500 Received: from mx1.suse.de ([195.135.220.2]:50982 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932748AbWLSKGw (ORCPT ); Tue, 19 Dec 2006 05:06:52 -0500 Date: Tue, 19 Dec 2006 11:06:33 +0100 Message-ID: From: Takashi Iwai To: "Ian E. Morgan" Cc: LKML , perex@suse.cz, alsa-devel@alsa-project.org, emu10k1-devel@lists.sourceforge.net Subject: Re: [Alsa-devel] Loud POP from sound system during module init w/ 2.6.19 In-Reply-To: <2a6e8c0d0612081053v4fa0f2b0uea82fac75976b767@mail.gmail.com> References: <2a6e8c0d0612081053v4fa0f2b0uea82fac75976b767@mail.gmail.com> User-Agent: Wanderlust/2.12.0 (Your Wildest Dreams) SEMI/1.14.6 (Maruoka) FLIM/1.14.7 (=?ISO-8859-4?Q?Sanj=F2?=) APEL/10.6 MULE XEmacs/21.5 (beta27) (fiddleheads) (+CVS-20060704) (i386-suse-linux) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1203 Lines: 33 At Fri, 8 Dec 2006 13:53:46 -0500, Ian E. Morgan wrote: > > Since upgrading to 2.6.19, two of my boxes (one workstation, one > notebook) started making a very loud (and scary) POP from the sound > system when the alsa modules are loaded. Unloading and reloading the > modules will generate another pop. > > I have removed any fiddling of mixer settings during module > load/unload; same results. > > I have complied the kernel both with and without > CONFIG_SND_AC97_POWER_SAVE; same results. > > The workstation uses snd_emu10k1, the notebook snd_intel8x0, so it's > affecting more than a single driver. > > Anybody else seeing this behaviour and know how to stop it? Hm, interesting. I thought this should be avoided by disabling CONFIG_SND_AC97_POWER_SAVE Kconfig. Do you get the noise at unloading or at loading time? If it's at unloading time, it's likely in some part of snd_ac97_powerdown(), handling of AC97_POWERDOWN bits, I guess. Takashi - 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/