From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - driver 0001726]: Front and Rear channels swap after first play when playing Surround40 on au8830 Date: Sun, 26 Feb 2006 13:28:48 +0100 Message-ID: <61fe81fa5bd2f011a5eea9ee99798362@bugtrack.alsa-project.org> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [85.132.177.35]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id 21F9E18F for ; Sun, 26 Feb 2006 13:28:49 +0100 (MET) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: Raymond Assigned To: mjander ====================================================================== Project: ALSA - driver Issue ID: 1726 Category: PCI - au88x0 Reproducibility: always Severity: major Priority: normal Status: assigned Distribution: Fedora Core 1 Kernel Version: 2.4.22-1.2199.nptl ====================================================================== Date Submitted: 01-08-2006 17:41 CET Last Modified: 02-26-2006 13:28 CET ====================================================================== Summary: Front and Rear channels swap after first play when playing Surround40 on au8830 Description: The front and rear channels are correct for playing Surround40 only at the first time after the driver is loaded. The front and rear channels (Surround40) always swapped afterward using speaker-test or xine. Playing stereo sound is OK. speaker-test -c4 -D hw:0,0 speaker-test 1.0.11rc2 Playback device is hw:0,0 Stream parameters are 48000Hz, S16_LE, 4 channels Using 16 octaves of pink noise Rate set to 48000Hz (requested 48000Hz) Buffer size range from 2 to 8192 Period size range from 1 to 512 Periods = 4 Buffer time size 2525 To choose buffer_size = 8192 To choose period_size = 2048 was set period_size = 512 was set buffer_size = 8192 0 - Front Left 1 - Front Right 3 - Rear Right 2 - Rear Left Time per period = 11.856821 0 - Front Left 1 - Front Right 3 - Rear Right 2 - Rear Left ====================================================================== ---------------------------------------------------------------------- ponchick - 02-26-06 07:22 ---------------------------------------------------------------------- I try to describe more cleanly: 1. Front/Rear swaps bug reproduced with any tool that use four channels including speaker-test, aplay, xine and mplayer. 2. au88x0_surround40.patch fix this issue completly 3. There is another similar issue when channels swap almost randomly (https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1726#0008085). It's reproduced by speaker-test but I cannot reproduce it with at least aplay and mplayer. au88x0_surround40.patch does not affect the bug at all. If someone can reproduce it with any tool other than speaker-test I think there should be separate bug report. 4. This bug is fixed and could be closed. ---------------------------------------------------------------------- Raymond - 02-26-06 13:28 ---------------------------------------------------------------------- Is it feasible to use the hook to provide real "front" and "rear" devices using pcm volume control https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1835 ? http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html#pcm_plugins_hooks hooks.0 { type ctl_elems hook_args [ { name "Sigmatel Surround Playback Switch" preserve true lock true optional true value [ 0 ] } { name "PCM Playback Volume" index { @func private_pcm_subdevice } lock true value [ 0 0 -48 -48] } ] } Issue History Date Modified Username Field Change ====================================================================== 01-08-06 17:41 Raymond New Issue 01-08-06 17:41 Raymond Distribution => Fedora Core 1 01-08-06 17:41 Raymond Kernel Version => 2.4.22-1.2199.nptl 01-27-06 16:45 Raymond File Added: au88x0_surround40.patch 02-04-06 06:26 Raymond Note Added: 0007912 02-10-06 05:36 ponchick Note Added: 0007987 02-10-06 06:32 Raymond Note Added: 0007991 02-10-06 10:50 ponchick Note Added: 0007998 02-10-06 11:25 Raymond Note Added: 0008000 02-10-06 13:49 Raymond Note Added: 0008003 02-10-06 13:56 Raymond Note Edited: 0008003 02-12-06 07:48 Raymond Note Edited: 0008003 02-12-06 10:12 Raymond Note Edited: 0008000 02-16-06 05:37 ponchick Note Added: 0008085 02-16-06 08:12 Raymond Note Added: 0008088 02-16-06 10:12 Raymond Note Added: 0008090 02-16-06 10:28 Raymond Note Edited: 0008090 02-16-06 16:07 Raymond Note Added: 0008097 02-17-06 03:35 ponchick Note Added: 0008104 02-17-06 04:28 Raymond Note Added: 0008105 02-17-06 04:35 Raymond Note Edited: 0008105 02-17-06 05:56 Raymond Note Edited: 0008105 02-17-06 06:09 Raymond Note Edited: 0008105 02-26-06 07:22 ponchick Note Added: 0008198 02-26-06 13:28 Raymond Note Added: 0008200 ====================================================================== ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642