Re: [Linphone-developers] Mediastreamer could not attach mixer to card

[Simon Morlat]

I have also these errors with my notebook, and it's not preventing
linphone to work at all.

> ALSA lib conf.c:4600:(snd_config_expand) Unknown parameters 0
> ALSA lib control.c:902:(snd_ctl_open_noupdate) Invalid CTL default:0
> ortp-warning-Could not attach mixer to card: Invalid argument

The first two are errors printed by libasound, and probably only it
knows what it means. They appeared after an upgrade of libasound (about
one year ago), without any change in linphone.
Alsa configuration is something very obscure to me. 

The warning indicates that the volume control mediastreamer2 can do on
the sound card won't work, however it is not used in linphone.

Simon

Le mercredi 10 février 2010 à 11:20 -0700, Denny Wright a écrit :
> Hi all,
> 
> I get the following when ms_init() runs. I found a reference to this
> error in the archive and it was resolved by editing alsa.conf (or
> perhaps /etc/asound.conf?)
> 
> http://lists.gnu.org/archive/html/linphone-developers/2009-07/msg00064.html
> 
> Unfortunately, I haven't figured out what the edits should be. Does
> anyone have any suggestions?
> 
> Thanks
> Denny
> 
> =============================================================
> ortp-message-Registering all filters...
> ortp-message-Registering all soundcard handlers
> ortp-message-Card ALSA: default added
> ALSA lib conf.c:4600:(snd_config_expand) Unknown parameters 0
> ALSA lib control.c:902:(snd_ctl_open_noupdate) Invalid CTL default:0
> ortp-warning-Could not attach mixer to card: Invalid argument
> ortp-message-Card ALSA: omap3530lv_som added
> ortp-message-Card OSS: /dev/dsp added
> ortp-message-Registering all webcam handlers
> ortp-message-Webcam StaticImage: Static picture added
> ortp-message-Loading plugins
> ortp-message-Cannot open directory /usr/lib/mediastreamer/plugins: No
> such file
> or directory
> ortp-message-ms_init() done
> =============================================================
> 
> I have an OMAP ARM board with a TI TPS65950 (i.e. TWL4030) and we're
> only using a portion of the audio channels. Here's some of my ALSA
> config (the mixer works fine with ALSA). What other information can I
> provide?
> 
> ==========================================
> # cat /proc/asound/cards
>  0 [omap3530lvsom  ]: twl4030 - omap3530lv_som
>                       omap3530lv_som (twl4030)
> # aplay -L
> default:CARD=omap3530lvsom
>     omap3530lv_som,
>     Default Audio Device
> null
>     Discard all samples (playback) or generate zero samples (capture)
> # amixer controls
> numid=4,iface=MIXER,name='Master Playback Switch'
> numid=6,iface=MIXER,name='Analog Capture Volume'
> numid=3,iface=MIXER,name='DAC2 Analog Playback Volume'
> numid=2,iface=MIXER,name='DAC2 Digital Coarse Playback Volume'
> numid=1,iface=MIXER,name='DAC2 Digital Fine Playback Volume'
> numid=5,iface=MIXER,name='TX2 Digital Capture Volume'
> ==========================================
> 
>     
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