[alsa-devel] [Alsa-user] Master volume control

Paul D. DeRocco pderocco at ix.netcom.com
Thu Mar 14 17:38:49 CET 2013

> From: Clemens Ladisch [mailto:clemens at ladisch.de] 
> I'd guess that some driver uses a busy loop for writing the codec
> registers.
> Which drivers are you using for your sound hardware?

It's Intel HD Audio.

But the point is that three other processes light up when I move the slider.
I think they're all monitoring the master volume changes, and not actually
involved in doing the volume change. I would expect lots of CPU usage if I
had alsamixer open at the time, because it monitors these changes, and
updates its display. But the numbers I got from "top -H" were with no
monitoring apps running that I know of.

What I'm wondering about these processes (pulseaudio, threaded-ml,
indicator-sound) is two things:

* Is there any way to disable or uninstall them in Ubuntu?

* If I create my own minimal embedded distro (I'm trying to use the Yocto
project for that), will they simply not be there, or will I have to go to
some lengths there, too, to disable or uninstall them?

If this is just an issue with Ubuntu, then it's not worth spending much time
on it, since this synth is targeted purely for an embedded environment.


Ciao,               Paul D. DeRocco
Paul                mailto:pderocco at ix.netcom.com 

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