[ALSA - driver 0002147]: lack of full duplex operation for ati-ixp chipset.

[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=2147> 
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Reported By:                Gene Heskett
Assigned To:                tiwai
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Project:                    ALSA - driver
Issue ID:                   2147
Category:                   PCI - atiixp
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Distribution:               FC5, uptodate
Kernel Version:             2.6.16-1.2111_FC5
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Date Submitted:             05-23-2006 03:52 CEST
Last Modified:              05-28-2006 04:24 CEST
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Summary:                    lack of full duplex operation for ati-ixp chipset.
Description: 
skype, ekiga, audacity, and generally any program that needs to both
transmit and receive, using isolated paths, fails in playback when
recording.  In skype, I sound great at the far end, but reception may or
may not work, with emphasis on the not.  What I hear in the phones, or in
the speakers, sounds like what you would get if you took a sentence of
spoken words, break it up into say 5ms pieces, and play them at maybe 10
of these little snippets per second, so that the resultant sound is broken
up to the point of no comprehension, and stretched in time by a
considerable amount.

In audacity, simultanious playback, or play one track while recording
another, likewise fails in that only very short snippets of the played
track are output to the phones or speakers.

Likewise, ekiga suffers from this same effect, I'm told I sound great on
teh other end, but I can't hear more than half a word occasionally.
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----------------------------------------------------------------------
 Raymond - 05-28-06 04:05 
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arecord -vv -fcd foo.wav
Recording WAVE 'foo.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
Warning: rate is not accurate (requested = 44100Hz, got = 48000Hz)
         please, try the plug plugin (-Dplug:default)
Hardware PCM card 0 'ATI IXP' device 0 subdevice 0

It seem that dmix and dsnoop are disabled and your card only support
48000Hz 

http://hg-mirror.alsa-project.org/alsa-lib?cmd=file;file=src/conf/cards/ATIIXP.conf;filenode=38d08ce2e926e4db86d686ddbab08f38a60edaf9;style=raw

Most likely the card need "type plug" for playing/recording 44100Hz

# default with dmix/dsnoop
ATIIXP.pcm.default {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type asym
	playback.pcm {
		type plug
		slave.pcm {
			@func concat
			strings [ "dmix:" $CARD ]
		}
	}
	capture.pcm {
		type plug
		slave.pcm {
			@func concat
			strings [ "dsnoop:" $CARD ]
		}
	}
}



----------------------------------------------------------------------
 rlrevell - 05-28-06 04:24 
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If you are using alsa-lib 1.0.11 it should be using dmix and dsnoop by
default.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
05-23-06 03:52 Gene Heskett   New Issue                                    
05-23-06 03:52 Gene Heskett   Distribution              => FC5, uptodate   
05-23-06 03:52 Gene Heskett   Kernel Version            => 2.6.16-1.2111_FC5
05-23-06 15:01 tiwai          Note Added: 0009934                          
05-23-06 16:46 Gene Heskett   Note Added: 0009938                          
05-23-06 17:24 tiwai          Note Added: 0009941                          
05-23-06 18:07 Gene Heskett   Note Added: 0009943                          
05-23-06 19:14 tiwai          Note Added: 0009947                          
05-28-06 03:08 Gene Heskett   Note Added: 0009985                          
05-28-06 03:20 Gene Heskett   Note Added: 0009986                          
05-28-06 03:22 rlrevell       Note Added: 0009987                          
05-28-06 03:58 Raymond        Note Added: 0009988                          
05-28-06 04:04 Raymond        Note Edited: 0009988                         
05-28-06 04:05 Raymond        Note Edited: 0009988                         
05-28-06 04:24 rlrevell       Note Added: 0009989                          
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