[pulseaudio-discuss] Configuring alsa mixers in the "off" profile.

[Mark Brown]

On Thu, Oct 06, 2011 at 01:49:38PM +0300, Tanu Kaskinen wrote:

> > Yeah the driver is unable to detect directly if someone wants to use
> > the analog signal. But that's not a big problem, there still could
> > exist the facility for explicitly turning the radio on and off. It's
> > also possible to imagine a use case where only RDS data is of
> > interest.

> arguing for or against turning off the radio automatically? What do you
> mean by "that's not a big problem"? (That's the sentence that causes my
> confusion.) If the driver doesn't know if someone is using the analog
> output (or RDS), isn't that a showstopper, if the goal is to turn off
> the radio automatically without any explicit request?

The driver can easily find this information out for the audio, there's
power information available from the audio subsystem.  I'd assume the
RDS can do the same thing easily by looking to see if the relevant
device is open or whatever.