I've had several occasions now where Jammr just hangs, portaudio disapears from the connections in qjackctl. I have to kill the application, and startup again. Not sure if I'm doing something wrong. I do use a firewire audio interface (audiofire12), running over the alsa driver.
When Jammr hangs, I also get an xrun warning in qjackctl.

If I can do something to help finding where the problem is, sure let me know :-)

Using ubuntustudio 15.04 by the way, with kxstudio repositories and updates(upgrades) installed

grtz,
Bart

Hi Bart,
After killing jammr, please check ~/.local/share/jammr/jammr/log.txt for error messages.

If you have trouble with JACK and don't need to route audio between applications, try running jammr with ALSA instead of JACK.

Stefan