From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Heung Subject: Re: gstreamer distortion w/ thinkpad buttons (tpb) polling nvram (CS46xx new DSP) Date: Mon, 26 Apr 2004 18:47:47 -0700 Sender: gstreamer-devel-admin@lists.sourceforge.net Message-ID: <408DBBC3.20109@berkeley.edu> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Errors-To: gstreamer-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Benjamin Otte Cc: gstreamer-devel@lists.sourceforge.net, alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org Anyone in alsa-devel have any ideas/clues for this bug? Should I file it there? On Apr 26, 2004, at 1:51 AM, Benjamin Otte wrote: > On Sun, 25 Apr 2004, Brian Heung wrote: > >> I'm not sure if this is a bug or not. In both the 0.6 and 0.8 >> releases, >> osssink output is distorted when TPB (Thinkpad Buttons) is running. >> TPB >> is a program that polls /dev/nvram for changes when using extra >> builtin >> buttons on IBM Thinkpads. >> >> If I set TPB to a longer polling period, the distortion is minimized, >> although it doesn't disappear. This only occurs with osssink and not >> alsasink or esdsink. >> >> Is this a bug? >> > It's definitely a bug. The interesting question is who is responsible > for > this bug? > If it only happens with GStreamer/OSS combo and not with other OSS > using > apps and if it happens on any kernel, it's pretty likely that we're at > fault. It doesn't hurt to file this as a bug in our bugzilla though I > don't think anybody from the GStreamer team has a Thinkpad so it's not > very likely that we can do something about it. > > Benjamin I did some more testing on this problem. It only appears with the GStreamer/OSS combo when using the cs46xx Alsa driver with OSS emulation. Specifically, it only occurs on the "New DSP support" option. The new DSP enables SPDIF and dual codecs but I only use it for the hardware mixer. I tested using the old DSP and OSS drivers and the problem did not appear. No other OSS applications cause the problems using the New DSP either. Brian ------------------------------------------------------- This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek For a limited time only, get FREE Ground shipping on all orders of $35 or more. Hurry up and shop folks, this offer expires April 30th! http://www.thinkgeek.com/freeshipping/?cpg=12297