From mboxrd@z Thu Jan 1 00:00:00 1970 From: Forest Bond Subject: via82xx: unreliable audio, strange mixer behavior Date: Thu, 20 Nov 2008 12:04:09 -0500 Message-ID: <20081120170409.GG17813@storm.local.network> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail3.webfaction.com (mail3.webfaction.com [70.85.44.146]) by alsa0.perex.cz (Postfix) with ESMTP id 50E562414E for ; Thu, 20 Nov 2008 18:04:16 +0100 (CET) Received: from storm (pool-64-223-124-145.burl.east.verizon.net [64.223.124.145]) (authenticated bits=0) by mail3.webfaction.com (8.13.1/8.13.3) with ESMTP id mAKH4E88031001 for ; Thu, 20 Nov 2008 11:04:15 -0600 Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: alsa-devel-bounces@alsa-project.org Errors-To: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org Hi, I'm using snd-via82xx on an Ubuntu 8.04 system. alsa-info.sh output is here: http://www.alsa-project.org/db/?f=1c3d5570e7b57d4d2f79b964a323dd7b4efd7e78 Here are the symptoms: Audio goes away after a semi-random interval. Sometimes it returns after `modprobe -r snd-via82xx' followed by `modprobe snd-via82xx', but sometimes it seems to take a full reboot. This looks similar to: https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3D3194 Some folks think that this kind of issue is triggered by audio volume being above a certain level. I'm not entirely sure if this is true, but I think it is. One time, I apparently triggered the issue by unplugging and replugging the audio cable from the mainboard during playback. Audio can be heard even when the PCM volume level is 0 (as told by alsamixer). The volume does get louder when I turn up that mixer control, but it never goes away entirely when I turn the volume to zero. Mute works as expected. This issue is impacting a significant project for me and my company. I'm willing to spend as much time as it takes to debug, and I'm fairly technical. I can also offer a bounty of some sort, if that interests anyone. Can anyone offer any input? Thanks, Forest -- Forest Bond http://www.alittletooquiet.net http://www.pytagsfs.org