On Mon, 2015-10-19 at 09:37 +0200, David Henningsson wrote: > > On 2015-10-04 17:05, Zeno Endemann wrote: > > 2. > > The spec implies that the reservation is for a whole device (ie. alsa > > card), so I believe a well-behaving client should not touch a reserved > > alsa card in any way. But PA only uses the reservation for PCM streams, > > not for the mixer controls of the card. My suggestion is either fixing > > PA (my preference) so that it reserves the card before writing any > > changes to the mixer, or at least making it clear in the spec that the > > reservation is only for all PCM devices on the corresponding card. > > I agree that PA should reserve the card before opening the mixer. > Patches welcome :-) Although you might want to synchronize with Tanu who > recently talked about closing the mixer when we lost access to it, that > sounds like something that touches similar parts of the code at least. If Zeno sends patches that conflict with my work, I can do the required rebasing. > (Side note: I would have liked to see the device reservation protocol on > the system bus instead of the session one, but that's likely too late to > change now) I think it's probably possible to do the transition to the system bus, if we just can find someone to write patches for both PulseAudio and Jack. During a transition phase we would have to use both buses, to cooperate with applications using only the session bus. -- Tanu
