From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932188AbVKLGRV (ORCPT ); Sat, 12 Nov 2005 01:17:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932193AbVKLGRV (ORCPT ); Sat, 12 Nov 2005 01:17:21 -0500 Received: from viper.oldcity.dca.net ([216.158.38.4]:16032 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S932188AbVKLGRU (ORCPT ); Sat, 12 Nov 2005 01:17:20 -0500 Subject: Re: CM8738 audio hampering while playing video on G450 PCI graphic card From: Lee Revell To: Mark Hurenkamp Cc: linux-kernel@vger.kernel.org In-Reply-To: <1131764444.11279.15.camel@mindpipe> References: <200511120241.54383.mark.hurenkamp@xs4all.nl> <1131764444.11279.15.camel@mindpipe> Content-Type: text/plain Date: Sat, 12 Nov 2005 01:14:37 -0500 Message-Id: <1131776077.13373.11.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.4.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2005-11-11 at 22:00 -0500, Lee Revell wrote: > On Sat, 2005-11-12 at 02:41 +0100, Mark Hurenkamp wrote: > > Now whenever there's a lot of activety (like scrolling down when I'm > > browsing on a news site like slashdot, or playing video) on the G450 (both in > > accelerated mode, as well as in unaccelerated framebuffer mode), the audio > > (onboard CMedia) starts to hamper. This happens regardless wether I'm using > > alsa, or oss. (using mplayer to play an mp3, but also with DivX movies > > the same problem occurs). > > Sounds like a "singing capacitor". Check the LKML archives. Never mind, Alan is probably right. If disabling PCIRetry does not work you can also try Option "NoAccel" (not a viable way to run, just to confirm the problem). WRT singing capacitors, it does seem to be an increasing problem: http://news.com.com/PCs+plagued+by+bad +capacitors/2100-1041_3-5942647.html?tag=nefd.lede The difference is that singing capacitors will cause noise in the audio, while PCI stalls of the type Alan described will cause dropouts/stuttering. Lee