[ALSA - driver 0000490]: Choppy sound when playing on Acer TravelMate 2000

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=490> 
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Reported By:                feixm
Assigned To:                tiwai
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Project:                    ALSA - driver
Issue ID:                   490
Category:                   PCI - atiixp
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Distribution:               linuxfromscratch, everything compiled from original
sources
Kernel Version:             2.6.8.1
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Date Submitted:             09-08-2004 21:16 CEST
Last Modified:              01-18-2005 21:25 CET
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Summary:                     Choppy sound when playing on Acer TravelMate 2000
Description: 
Hello,

when playing any audio file from my new Acer TravelMate 2000, the sound is
very choppy. I tried playing using xmms, mplayer and others. From lspci I
see, it is an ATI IXP 150. I understand that this bugreport alone won't
help you guys, so if I can give any more info, pls let me know.

When playing movies with mplayer, I see lots of messages like:

alsa-play: xrun of at least 0,131 msecs. resetting stream%  0%  0,0% 1 0
0%
alsa-play: xrun of at least 0,026 msecs. resetting stream 0%  0%  0,0% 7 0
0%

These appear even more where skipping back and forward in the movie.

I found, that playing movies through SDL helps a little, but sound is
still choppy and cannot be listened to.
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----------------------------------------------------------------------
 tiwai - 01-18-05 11:32 
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Try 1.0.8.  Some hardwares have a bug in reading DMA pointer register.  The
latest ALSA version has a workaround.

----------------------------------------------------------------------
 rlrevell - 01-18-05 21:25 
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I think this is an mplayer bug.  I get the same behavior - it's unusable
with ALSA output because they reset the stream on every xrun, and xruns
are inevitable because they don't use a separate RT thread for audio.

Try oss emulation, mplayer -ao oss.  This works for me.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
09-08-04 21:16 feixm          New Issue                                    
09-08-04 21:16 feixm          Distribution              => linuxfromscratch,
everything compiled from original sources
09-08-04 21:16 feixm          Kernel Version            => 2.6.8.1         
01-18-05 07:56 rounin         Note Added: 0003242                          
01-18-05 07:59 rounin         Issue Monitored: rounin                      
01-18-05 08:09 rounin         Note Added: 0003245                          
01-18-05 11:32 tiwai          Note Added: 0003247                          
01-18-05 21:25 rlrevell       Note Added: 0003260                          
======================================================================




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