Hi, I have exactly the same problem.
Note that I get it in different machines with both Debian stable and testing,
both with and without Pulseaudio. Linphone worked perfectly until a couple
of months ago, then it just stopped. Note also that sometimes sound starts working,
but it appears to be completely random and I can't reproduce it.
Everything seems fine following your advice below, and Pulseaudio does not
seem to be the problem.
Any ideas?
Thanks,
Greg
> At 14:16h, on Friday, March 18, 2016, in message <address@hidden>, on the
> subject of "[Linphone-users] No sound from called number", Halb Taxabo
> observed --
>
> > linphone output startALSA lib conf.c:4738:(snd_config_expand) Unknown
> > parameters 0ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL
> > default:0ALSA lib conf.c:4738:(snd_config_expand) Unknown parameters 0ALSA
> > lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:0ALSA lib
> > conf.c:4738:(snd_config_expand) Unknown parameters 0ALSA lib
> > pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:0ALSA lib
> > conf.c:4738:(snd_config_expand) Unknown parameters 1ALSA lib
> > control.c:954:(snd_ctl_open_noupdate) Invalid CTL default:1ALSA lib
> > conf.c:4738:(snd_config_expand) Unknown parameters 1ALSA lib
> > pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:1ALSA lib
> > conf.c:4738:(snd_config_expand) Unknown parameters 1ALSA lib
> > pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:1
>
> This message is telling your that linphone cannot communicate with the ALSA
> device which it is
> configured to use.
>
> You need to check what ALSA sound devices, if any, are recognized and setup by
> the kernel with
>
> cat /proc/asound/cards
>
> then you need, as you indicate you have Pulseaudio running, whether or not you
> have sound to
> the ALSA device output set in linphone going to an ALSA device which is already
> being used
> (indirectly) by PulseAudio, and thus cannot be used when PulseAudio is running.
>
> The simple solution would be, if you are getting sounds from PulseAudio to set
> the output
> of linphone to Pulseaudio instead of the ALSA device which may or may not exist
> (especially
> if it is a USB sound card which you have forgotten to plug in).
>
> Just to clarify since many people do not seem to understand this, sound
> capablity on GNU/Linux
> is a layered structure and in the inverted (ie bottom to top) representation
>
>
> Physical sound card
> |
> kernel ALSA modules
> |
> /dev/snd device files
> |
> ALSA libraries
> }
> +-->ALSA user interface ---> ALSA user applications eg
> alsamixer
> |
> PulseAudio
> |
> +--> Pulseaudio user interface --> PulseAudio user
> applications eg pavucontrol\
>
>
> It also needs to be mentioned that in many GNU/Linux distributions, it is now
> standard practice to
> re-route sound intended for the default ALSA device to go to PulseAudio instead
> using eg
> /usr/share/alsa/pulse.conf with
>
>
> pcm.!default {
> type pulse
>
> etc ...
>
> Hopw this helps to get your sound problem resolved.