[ALSA - driver 0001009]: NVidia CK8S 8ch: a center speaker is always silent in native alsa mode (through alsa-lib), works with oss emulation though

[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=1009> 
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Reported By:                modax
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   1009
Category:                   PCI - intel8x0
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Distribution:               Debian unstable
Kernel Version:             vanilla 2.6.11.5 with self-compiled alsa-driver
1.0.9rc1
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Date Submitted:             03-22-2005 22:34 CET
Last Modified:              03-25-2005 00:37 CET
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Summary:                    NVidia CK8S 8ch: a center speaker is always silent
in native alsa mode (through alsa-lib), works with oss emulation though
Description: 
A center speaker stays quiet while playing 5.1 audio directly through
alsa-lib (eg. with kaffeine (xine) or mplayer using alsa plugin). As a
result, I'm unable to hear what people are speaking in movies because the
speech is usually sent to the center speaker (correct me if i'm wrong. i'm
new to all this 5.1 business). Anyway, adjusting the volume,
muting/unmuting "Center" section, enabling/disabling "Mic As Center/LFE"
doesn't have any effect on the center speaker. It stays silent. However,
as I noted in the summary, the center speaker works with oss audio driver
of xine/mplayer (using oss emulation). However, that mode is not perfect
as the center speaker plays the role of left surround and vice versa. In
addition, a right surround speaker stays always silent (i guess that's
because the RS channel needs to be swapped with LFE; at least I got this
impression by having a look at
/usr/share/alsa/cards/NForce.conf:surround51). To sum up, my problem is
that I can't get the center speaker (which, I guess, is channel 2 on my
hardware) working with native alsa apps playing ac3/5.1 audio.
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----------------------------------------------------------------------
 tiwai - 03-23-05 13:01 
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Try speaker-test in alsa-utils.

For more debugging, the content of /etc/asound.state and
/proc/asound/card0/codec97#0/* files are necessary.

What is the crash of alsa-lib 1.0.9rc1?  It's more important!
(Note that you have to use alsa-driver 1.0.9rc1 with alsa-lib 1.0.9rc1.)

----------------------------------------------------------------------
 modax - 03-25-05 00:37 
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ok. now I've upgraded to alsa-driver 1.0.9rc2 and alsa-lib 1.0.9rc2. I no
longer experience mplayer/kaffeine crashes/stalls (which was, actually,
kernel oopsing somewhere in snd_timer; I think it's not important anymore
as rc2 fixed this). However, the different problem has arisen.
-Dsurround51 (either with speaker-test or mplayer) outputs no sound at all
or some jerky tones. kaffeine (xine) says "Audio output unavailable.
Device is busy. ()", but this is not true! -Dfront works fine with any app
(artsd/mplayer in 2ch mode/kaffeine in 2ch mode/aplay etc.) though.

There's no /etc/asound.state on my system. However, I've found
/var/lib/alsa/asound.state which I've targzipped together with the stuff
from /proc/asound/card0/codec97#0/ and attached here.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
03-22-05 22:34 modax          New Issue                                    
03-22-05 22:34 modax          Distribution              => Debian unstable 
03-22-05 22:34 modax          Kernel Version            => vanilla 2.6.11.5 with
self-compiled alsa-driver 1.0.9rc1
03-23-05 13:01 tiwai          Note Added: 0004156                          
03-25-05 00:37 modax          Note Added: 0004204                          
======================================================================




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