[linux-audio-user] Jack crashes

Hello! I am trying to use jack 0.70.4. The reason for the old version is simple - Rosegarden 4 0.9.1 fails to build with 0.72.4. /tmp/jack is symlinked to /mnt/ramfs. I start "jack -d alsa" from a root terminal window. It starts successfully (but with a warning about the "plug" layer). And it runs, although it reports xruns every time I move a window. This lasts while no clients are connected to jack. Now I start "fluidsynth -a jack" from another root terminal window. (No further parameters, and I have not attempted to get any actual sound as yet). It connects successfully. But very soon the following happens in the window that now runs jackd: === could not complete playback of 1024 frames cycle execution failure, exiting telling signal thread that the engine is done jack main caught signal 1 === With this, jackd exits. The same happens if rosegarden is used as the client, instead of fluidsynth. What should I do to fix this problem? Thanks in advance for any answers! Yours, Mikhail Ramendik