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May-C

Member

Registered: 2007-12-28

Posts: 83

Problem with alsa pcm device

Hello

I have a rather strange behaviour here. I have various channels here with my soundcard. One of them is PCM and one is Front. However PCM disappears from time to time and shows later up again. The sound card is an integrated nvidia MCP61 HDA (at least alsaconf says it is).

Has anybody an idea how to fix this?

May-C

Member

Registered: 2007-12-28

Posts: 83

Re: Problem with alsa pcm device

Push...
Nobody has any idea ?

zenlord

Member

From: Belgium

Registered: 2006-05-24

Posts: 1,221

Website

Re: Problem with alsa pcm device

Did you allow 'alsaconf' to modify your modprobe.conf?

Are all drivers loaded when PCM has disappeared from the mixer panel? Do you see any errors in system logs?

Zl.

May-C

Member

Registered: 2007-12-28

Posts: 83

Re: Problem with alsa pcm device

Yes alsaconf wrote following into /etc/modprobe.conf

# --- BEGIN: Generated by ALSACONF, do not edit. ---
# --- ALSACONF version 1.0.15 ---
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel

lsmod | grep snd gives me following when pcm is available:

snd_seq_oss            33408  0
snd_seq_midi_event      7936  1 snd_seq_oss
snd_seq                56064  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          8084  2 snd_seq_oss,snd_seq
snd_pcm_oss            42400  0
snd_mixer_oss          17024  1 snd_pcm_oss
snd_hda_intel         382504  4
snd_pcm                82440  2 snd_pcm_oss,snd_hda_intel
snd_timer              22792  2 snd_seq,snd_pcm
snd_page_alloc          9232  2 snd_hda_intel,snd_pcm
snd_hwdep               9096  1 snd_hda_intel
snd                    58312  17 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep
soundcore               8096  1 snd

and following when it is not available:

snd_seq_oss            33408  0
snd_seq_midi_event      7936  1 snd_seq_oss
snd_seq                56064  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          8084  2 snd_seq_oss,snd_seq
snd_pcm_oss            42400  0
snd_mixer_oss          17024  1 snd_pcm_oss
snd_hda_intel         382504  2
snd_pcm                82440  2 snd_pcm_oss,snd_hda_intel
snd_timer              22792  2 snd_seq,snd_pcm
snd_page_alloc          9232  2 snd_hda_intel,snd_pcm
snd_hwdep               9096  1 snd_hda_intel
snd                    58312  13 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep
soundcore               8096  1 snd

so the diff between those are:

7c7
< snd_hda_intel         382504  4
---
> snd_hda_intel         382504  2
12c12
< snd                    58312  17 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep
---
> snd                    58312  13 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep

May-C

Member

Registered: 2007-12-28

Posts: 83

Re: Problem with alsa pcm device

Ok it is not an alsa problem! KMix seems to be the problem

Last edited by May-C (2008-02-02 06:22:39)

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: Problem with alsa pcm device

Get rid of those modprobe.conf lines.

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