[ALSA - driver 0000758]: Full duplex is not working in OSS emulation.

[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=758> 
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Reported By:                croiset
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   758
Category:                   PCI - RME 96
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Distribution:               Redhat 7.2
Kernel Version:             2.4.7
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Date Submitted:             12-29-2004 10:15 CET
Last Modified:              01-03-2005 16:30 CET
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Summary:                    Full duplex is not working in OSS emulation.
Description: 
If I play something with one player, I am unable to record something on the
same device.
The same thing ispossible with the other cards I have.
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----------------------------------------------------------------------
 croiset - 12-29-04 18:18 
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I forget one important i think. NAS use the dsp in playback mode I don't
record anything (PS : I want to record in analog mode).

# cat /proc/asound/card0/pcm0p/sub0/info
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: Digi96 IEC958
name: Digi96 IEC958
subname: subdevice https://bugtrack.alsa-project.org/alsa-bug/view.php?id=0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 0



----------------------------------------------------------------------
 croiset - 01-03-05 16:30 
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I made some more tests and the error after an ioctl.

line_fd = open(_opt->device, O_RDONLY|O_NONBLOCK )
-> ok
fcntl(line_fd,F_SETFD,FD_CLOEXEC)
-> ok
ioctl(line_fd, SNDCTL_DSP_SETFRAGMENT, &frag)
-> ok
ioctl(line_fd, SNDCTL_DSP_SETFMT, &afmt)
-> return -1 errno = 16 (Device or resource busy)
ioctl(line_fd, SNDCTL_DSP_CHANNELS,    &channels)
-> return -1 errno = 16 (Device or resource busy)
ioctl(line_fd, SNDCTL_DSP_SPEED,       &rate)
-> return -1 errno = 16 (Device or resource busy)
read(line_fd, audio_data, size)
-> return -1 errno = 16 (Device or resource busy)

Issue History
Date Modified  Username       Field                    Change              
======================================================================
12-29-04 10:15 croiset        New Issue                                    
12-29-04 10:15 croiset        Distribution              => Redhat 7.2      
12-29-04 10:15 croiset        Kernel Version            => 2.4.7           
12-29-04 14:17 tiwai          Note Added: 0002998                          
12-29-04 14:54 croiset        Note Added: 0003000                          
12-29-04 17:39 tiwai          Note Added: 0003004                          
12-29-04 17:56 croiset        Note Added: 0003005                          
12-29-04 17:59 croiset        Note Added: 0003006                          
12-29-04 18:05 croiset        Note Edited: 0003006                         
12-29-04 18:18 croiset        Note Edited: 0003006                         
01-03-05 16:30 croiset        Note Added: 0003067                          
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