On Tue, Oct 04, 2011 at 02:30:17PM +0300, Tanu Kaskinen wrote: > I'm not sure that would work in this case. The mixer element is an > enumeration with states "Off", "Rx" and "Tx". I've been told that it > controls whether the FM radio is powered on (and whether it's in the > reception or transmission mode). Of course, the logic could also include > a rule that if one of the options for an enumeration is "Off", that will > be used unless something else is specified. It should only be powered if someone routes audio to it. Is that the case?