Lennart, I was looking at the latest code and in git-master I saw changes to the alsa-sink/source files, and a new 'reserve' module. Can you please shed some light on why PA would try to lock a device, or resume a sink when an ALSA device becomes 'unused'. My understanding was that apps using ALSA would see PCM samples redirected to PulseAudio thanks to the pulse plugin, and PA would be the only app using hw:0. What uses do you have in mind? Thanks Pierre