alsasrc ...is busy

[Pavel Hofman]

Dne 10. 04. 19 v 15:18 Carl Karsten napsal(a):
> 
> 
> On Wed, Apr 10, 2019 at 1:07 AM Pavel Hofman <pavel.hofman at ivitera.com 
> <mailto:pavel.hofman at ivitera.com>> wrote:
> 
>     Dne 10. 04. 19 v 7:54 Carl Karsten napsal(a):
>      > alsasrc device=hw:0,0 ... Device 'hw:0,0' is busy -
>      > how do I un-busy it?
>      >
>      > I'm sure that involves discovering what has it locked.
>      >
> 
>     This command lists processes using your sound devices:
> 
>     sudo lsof /dev/snd/*
> 
>     Most typically pulseaudio, IME.
> 
> 
> yep - thanks.
> 
> juser at odroid3:/usr/local/bin$ sudo lsof /dev/snd/*
> COMMAND   PID  USER   FD   TYPE DEVICE SIZE/OFF  NODE NAME
> pulseaudi 666 juser   21u   CHR 116,32      0t0 10590 /dev/snd/controlC1
> pulseaudi 666 juser   27u   CHR 116,32      0t0 10590 /dev/snd/controlC1
> pulseaudi 666 juser   33u   CHR  116,0      0t0  1217 /dev/snd/controlC0
> pulseaudi 666 juser   40u   CHR  116,0      0t0  1217 /dev/snd/controlC0

Very typical view :-)

You can set any soundcard to Off/disabled in PA control panel (e.g. 
pavucontrol). PA will not touch it anymore. Very handy when working on a 
regular workstation where PA has its merit - typically running the 
onboard soundcard via PA, while an external quality soundcard via alsa 
directly.

Regards,

Pavel.