Jack Crashes With "Bus Error"

[James Pollard]

Hi All,

Have recently installed karmic koala ubuntu studio and have been very happy
with the overall feel of the system. Got a couple of strange niggles. The
first is that Jack often won't start either from using QJackctl or from the
command line. Often it starts up first time, but if it is stopped it won't
restart until I shut down the computer and start again (loging out doesn't
help). Starting from the command line gives me a "Bus Error" and no further
information. I've tried googling this but have not got anywhere.

The sound card I'm using is a USB m-audio MobilePre.

Any ideas appreciated. Not sure where to start with this.

thanks,
James.
PS: Command line output below:
/usr/bin/jackd -R -dalsa -r44100 -p64 -n4 -D -Chw:1 -Phw:1
no message buffer overruns
jackd 0.116.1
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
apparent rate = 44100
creating alsa driver ... hw:1|hw:1|64|4|44100|0|0|nomon|swmeter|-|32bit
control device hw:1
Bus error
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