Ubuntu
alsa-utils package

Unknown PCM hw:0,0 : no sound anymore

Bug #33420 reported by Lionel Dricot
6
Affects Status Importance Assigned to Milestone
Ubuntu
Invalid
Medium
Unassigned
alsa-utils (Ubuntu)
Invalid
Medium
Martin Pitt

Bug Description

Since the 1st march 2006 in Dapper, I don't have any sound with alsa anymore.

Just launching totem gives :

ALSA lib confmisc.c:1107:(snd_func_refer) Unable to find definition 'defaults.pcm.subdevice'
ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:3951:(snd_config_expand) Args evaluate error: No such file or directory
ALSA lib pcm.c:2099:(snd_pcm_open_noupdate) Unknown PCM hw:0,0
ALSA lib pcm_dmix.c:819:(snd_pcm_dmix_open) unable to open slave
ALSA lib confmisc.c:1107:(snd_func_refer) Unable to find definition 'defaults.pcm.subdevice'
ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:3951:(snd_config_expand) Args evaluate error: No such file or directory
ALSA lib pcm.c:2099:(snd_pcm_open_noupdate) Unknown PCM hw:0,0
ALSA lib pcm_dmix.c:819:(snd_pcm_dmix_open) unable to open slave

It's not a gstreamer bug because noone has sound anymore.

Strangely, sound is still working for applications that use OSS. So OSS->ALSA is still working

My soundcard is : C-Media PCI CMI8738

I also have an onboard nVidia NForce2 that I've disabled a few months ago. (I blacklisted the module for the NForce2 sor the CMI would work. I was working for a long time without any problem)

Note: the original reporter indicated the bug was in package 'alsa'; however, that package was not published in Ubuntu.

Revision history for this message
Martin Pitt (pitti) wrote :

Just debugged in IRC:

<ploum> **** List of PLAYBACK Hardware Devices ****
<ploum> card 0: CMI8738 [C-Media PCI CMI8738], device 0: CMI8738 [C-Media PCI DAC/ADC]
<ploum> Subdevices: 1/1
<ploum> Subdevice #0: subdevice #0
<ploum> card 0: CMI8738 [C-Media PCI CMI8738], device 1: CMI8738 [C-Media PCI 2nd DAC]
<ploum> Subdevices: 1/1
<ploum> Subdevice #0: subdevice #0
<ploum> card 0: CMI8738 [C-Media PCI CMI8738], device 2: CMI8738 [C-Media PCI IEC958]
<ploum> Subdevices: 1/1
<ploum> Subdevice #0: subdevice #0

original .asoundrc.asoundconf:
!defaults.pcm.card CMI8738

This needs another line to work properly:
defaults.pcm.subdevice 0

Revision history for this message
WillDyson (will-dyson) wrote :

I was just experiencing this problem myself. Hardware is a Dell 700m laptop.

Alsa programs were giving output similar to:

will@lappy:~$ amixer
ALSA lib confmisc.c:1107:(snd_func_refer) Unable to find definition 'defaults.ctl.card'
ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib confmisc.c:242:(snd_func_getenv) error evaluating default
ALSA lib conf.c:3493:(_snd_config_evaluate) function snd_func_getenv returned error: No such file or directory
ALSA lib conf.c:3962:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib control.c:817:(snd_ctl_open_noupdate) Invalid CTL default
amixer: Mixer attach default error: No such file or directory

My original .asoundrc.asoundconf contained only the following non-comment line:

!defaults.pcm.card I82801DBICH4

Manually adding the following fixed it:

!defaults.ctl.card I82801DBICH4

Also just removing the line from .asoundrc that references .asoundrc.asoundconf fixes the entire issue.

Revision history for this message
Daniel T Chen (crimsun) wrote :

Having asoundconf set !defaults.ctl.card does the trick (as mentioned above).

Revision history for this message
Martin Pitt (pitti) wrote :

Rejecting useless 'Ubuntu' task.

Revision history for this message
Martin Pitt (pitti) wrote :

Closing as duplicate.

Changed in alsa-utils:
status: Confirmed → Rejected
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