The jack-audio-connection-kit needs to run in realtime mode and my system is configured accordingly. I'm using the fglxr driver.
With Unity-2d everything is fine.
With Unity-3d, jack-clients disconnect from jack very often, usually when something happens to windows (being drawn first time, brought to front, opening menus ...).
It's still the same driver, but it seems like the 3d accleration part of it is not preemptable.
What are my options besides sticking to Unity-2d (I really painfully miss window drop- shadows)?
I did not even find a way to report a bug against the driver itself, and do not know how to further diagnose the issue, anyway.