[Pkg-alsa-devel] Bug#741554:

[Elimar Riesebieter]

* Andoru <andoru.blah at gmail.com> [2014-03-17 21:30 +0200]:

> Thanks for your reply Elimar,
> 
> 
> > Try moc ;-)
> 
> Hehe, I did that now, but it reports "Segmentation fault"
> I installed it through apt-get.

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=740612

> 
> > The default card should be card '0'
> >
> > aplay -v ist only for cinematics ;-) Please post the output of
> >
> > # aplay -l
> > # aplay -L
> > # lsmod | grep snd
> >
> > The output would be insteresting at a working _and_ a none working
> > sound please∵
> 
> Not sure what you mean by the last sentence, but here you go:

 - The output generated while sound is working.
 - The output generated while sound doesn't work.


> __________________________________________________________________________
> $ sudo aplay -l
> 
> **** List of PLAYBACK Hardware Devices ****
> card 0: CMI8738 [C-Media CMI8738], device 0: CMI8738-MC6 [C-Media PCI DAC/ADC]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: CMI8738 [C-Media CMI8738], device 1: CMI8738-MC6 [C-Media PCI 2nd DAC]
> 
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: CMI8738 [C-Media CMI8738], device 2: CMI8738-MC6 [C-Media PCI IEC958]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> 
> ___________________________________________________________________________
> 
> $ sudo aplay -L
> null
>     Discard all samples (playback) or generate zero samples (capture)
> default:CARD=CMI8738
>     C-Media CMI8738, C-Media PCI DAC/ADC
>     Default Audio Device
> sysdefault:CARD=CMI8738
> 
>     C-Media CMI8738, C-Media PCI DAC/ADC
>     Default Audio Device
> front:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI DAC/ADC
>     Front speakers
> rear:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI 2nd DAC
> 
>     Rear speakers
> surround40:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI 2nd DAC
>     4.0 Surround output to Front and Rear speakers
> surround41:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI 2nd DAC
> 
>     4.1 Surround output to Front, Rear and Subwoofer speakers
> surround50:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI 2nd DAC
>     5.0 Surround output to Front, Center and Rear speakers
> surround51:CARD=CMI8738,DEV=0
> 
>     C-Media CMI8738, C-Media PCI 2nd DAC
>     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
> iec958:CARD=CMI8738,DEV=0
>     C-Media CMI8738, C-Media PCI DAC/ADC
>     IEC958 (S/PDIF) Digital Audio Output

Anyway, this all looks reasonable. You should be able to control
pcm amd master via alsamixer with no problems.

> ___________________________________________________________________________
> $ sudo lsmod | grep snd
> snd_cmipci             31843  1
> snd_mpu401_uart        13299  1 snd_cmipci
> snd_seq_midi           12744  0
> 
> snd_seq_midi_event     13124  1 snd_seq_midi
> snd_rawmidi            22283  2 snd_mpu401_uart,snd_seq_midi
> snd_opl3_lib           17206  1 snd_cmipci
> snd_hwdep              12906  1 snd_opl3_lib
> snd_pcm                69546  1 snd_cmipci
> 
> snd_page_alloc         12882  1 snd_pcm
> snd_seq                43336  2 snd_seq_midi_event,snd_seq_midi
> snd_seq_device         12980  4 snd_seq,snd_rawmidi,snd_opl3_lib,snd_seq_midi
> snd_timer              22010  3 snd_pcm,snd_seq,snd_opl3_lib
> 
> snd                    46678  11
> snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_mpu401_uart,snd_seq_device,snd_cmipci,snd_opl3_lib
> soundcore              12890  1 snd
> gameport               13280  1 snd_cmipci

What tells:
# modinfo snd_mpu401_uart

I don't have a CMI8738 card handy for testing.

> ____________________________________________________________________________
> 
> > Do you have a webcam running beside?
> 
> No.

Hmm, you must be thoughtful to notice a system event which causes
your bug. I can't help at this stage as there are no similar bugs
reported in the net.

There is a comprehensive howto at
http://www.johannes-bauer.com/linux/dolby/

Maybe it helps?

Elimar
-- 
  Alles was viel bedacht wird ist bedenklich!;-)
         Friedrich Nietzsche