[alsa-devel] Softvol only after device has opened

[Takashi Iwai]

At Tue, 9 Jun 2015 16:45:32 +0200,
Ricard Wanderlof wrote:
> 
> 
> On Tue, 9 Jun 2015, Takashi Iwai wrote:
> 
> > > > Have a look at /var/lib/asound.state.  "alsactl store" marks any user-
> > > > space controls; when "alsactl restore" sees this flag, it will explicitly
> > > > recreate the control.
> > > 
> > > And there is no other way to recreate the control using an application 
> > > than to use alsactl then?
> > 
> > There is other way, of course.  It's no magic.  alsactl just creates a
> > user-space control element using the normal API.
> 
> Yes, of course that's doable, I was wondering if there's some other 
> application that I don't know about that could do it. I.e. if there's a 
> startup script that normally uses amixer to set up default settings, is it 
> possible to add something to that script rather than to write a separate 
> application to create the user control, which of course is doable too.

Just open PCM once and close.  That should suffice :)

Other than that, an easy way is to run alsactl restore with a snippet
of user-space ctl element definition as Clemens suggested.


Takashi