[apport] jackd crashed with SIGSEGV in pthread_cancel()

17:59:57.136 Patchbay deactivated.
17:59:57.181 Statistics reset.
17:59:57.431 Startup script...
17:59:57.432 artsshell -q terminate
17:59:57.496 MIDI connection graph change.
sh: artsshell: not found
17:59:57.702 Startup script terminated with exit status=32512.
17:59:57.714 JACK is starting...
17:59:57.715 jackd -R -p128 -t4900 -dalsa -ddefault -r48000 -p64 -n2 -D -C/dev/dsp -S
17:59:57.731 JACK was started with PID=5990 (0x1766).
17:59:57.936 Could not connect to JACK server as client. Please check the messages window for more info.
jackd 0.102.20
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 = 48000
creating alsa driver ... default|/dev/dsp|64|2|48000|0|0|nomon|swmeter|-|16bit
ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM /dev/dsp
ALSA: Cannot open PCM device alsa_pcm for capture. Falling back to playback-only mode
configuring for 48000Hz, period = 64 frames, buffer = 2 periods
ALSA: final selected sample format for playback: 16bit little-endian
You appear to be using the ALSA software "plug" layer, probably
a result of using the "default" ALSA device. This is less
efficient than it could be. Consider using a hardware device
instead rather than using the plug layer. Usually the name of the
hardware device that corresponds to the first soun
ALSA: cannot set period size to 64 frames for playback
ALSA: cannot configure playback channel
cannot load driver module alsa
18:00:02.708 JACK was stopped successfully.
18:00:03.809 MIDI connection change.

ProblemType: Crash
Architecture: i386
Date: Fri Mar 9 18:00:00 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/jackd
Package: jackd 0.102.20-1
PackageArchitecture: i386
ProcCmdline: jackd -R -p128 -t4900 -dalsa -ddefault -r48000 -p64 -n2 -D -C/dev/dsp -S
ProcCwd: /home/pentti
ProcEnviron:
 LANGUAGE=fi_FI:fi:en_GB:en
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 LANG=fi_FI.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: jack-audio-connection-kit
Stacktrace:
 #0 0xb7f41400 in pthread_cancel () from /lib/tls/i686/cmov/libpthread.so.0
 #1 0x0804e80e in ?? ()
 #2 0x00000000 in ?? ()
StacktraceTop:
 pthread_cancel () from /lib/tls/i686/cmov/libpthread.so.0
 ?? ()
 ?? ()
Uname: Linux pentti 2.6.20-9-386 #2 Mon Feb 26 02:58:41 UTC 2007 i686 GNU/Linux
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin plugdev scanner video