No audio when using Jack sync
I'm using Ardour (built from source, current master) with xjadeo. I've syncronized the two via JACK, but Ardour refuses to play any audio when external sync (via JACK) is enabled.
The session plays normally when using internal sync (the sync button towards the top left of the main window is disabled and reads 'Int.'). When this button is pressed (and reads 'JACK'), the tracks no longer playback any audio. (no levels are seen in the mixer).
Interestingly, the metronome still produces audio, so the audio engine still seems to be getting audio out of Ardour, but nothing comes out of the tracks.
Toggling the monitor buttons in the mixer (the 'in' and 'disk' buttons next to the record arm button) have no effect either.
Anyone got any ideas?