*** This bug is a duplicate of bug 956438 ***
    https://bugs.launchpad.net/bugs/956438

Same thing for me.

crashes 3 out of 5 times

-=-=
23:49:44.627 D-BUS: JACK-Server konnte nicht angehalten werden. Tut mir leid
Fri Dec 21 23:49:44 2012: Client 'qjackctl' with PID 25031 is out
Fri Dec 21 23:49:44 2012: Stopping jack server...
Fri Dec 21 23:49:44 2012: Client 'system' with PID 0 is out
Fri Dec 21 23:49:44 2012: ERROR: Abort!
Fri Dec 21 23:49:44 2012: ERROR: info.si_signo = 6
Fri Dec 21 23:49:44 2012: ERROR: info.si_errno = 0
Fri Dec 21 23:49:44 2012: ERROR: Segmentation Fault!
Fri Dec 21 23:49:44 2012: ERROR: info.si_signo = 11
Fri Dec 21 23:49:44 2012: ERROR: info.si_errno = 0
Fri Dec 21 23:49:44 2012: ERROR: info.si_code  = 1 (SEGV_MAPERR)
Fri Dec 21 23:49:44 2012: ERROR: info.si_addr  = 0x525245
Fri Dec 21 23:49:44 2012: ERROR: reg[00]       = 0x00007fb07a1292b8
Fri Dec 21 23:49:44 2012: ERROR: reg[01]       = 0x0000000000000000
Fri Dec 21 23:49:44 2012: ERROR: reg[02]       = 0x00000000ffff8000
Fri Dec 21 23:49:44 2012: ERROR: reg[03]       = 0x0000000000000246
Fri Dec 21 23:49:44 2012: ERROR: reg[04]       = 0x00007fb07a1296f8
Fri Dec 21 23:49:44 2012: ERROR: reg[05]       = 0x0000000000413c3b
Fri Dec 21 23:49:44 2012: ERROR: reg[06]       = 0x0000000000000014
Fri Dec 21 23:49:44 2012: ERROR: reg[07]       = 0x0000000000000000
Fri Dec 21 23:49:44 2012: ERROR: reg[08]       = 0x0000000000525245
Fri Dec 21 23:49:44 2012: ERROR: reg[09]       = 0x0000000000413c4d
Fri Dec 21 23:49:44 2012: ERROR: reg[10]       = 0x00007fb07a1293f0
Fri Dec 21 23:49:44 2012: ERROR: reg[11]       = 0x00007fb07a129400
Fri Dec 21 23:49:44 2012: ERROR: reg[12]       = 0x0000000000000018
Fri Dec 21 23:49:44 2012: ERROR: reg[13]       = 0x0000000000000000
Fri Dec 21 23:49:44 2012: ERROR: reg[14]       = 0xffffffffffffffff
Fri Dec 21 23:49:44 2012: ERROR: reg[15]       = 0x00007fb07a128d90
Fri Dec 21 23:49:44 2012: ERROR: reg[16]       = 0x00007fb078eb83b1
Fri Dec 21 23:49:44 2012: ERROR: reg[17]       = 0x0000000000010246
Fri Dec 21 23:49:44 2012: ERROR: reg[18]       = 0x0000000000000033
Fri Dec 21 23:49:44 2012: ERROR: reg[19]       = 0x0000000000000004
Fri Dec 21 23:49:44 2012: ERROR: reg[20]       = 0x000000000000000e
Fri Dec 21 23:49:44 2012: ERROR: reg[21]       = 0x0000000080005a27
Fri Dec 21 23:49:44 2012: ERROR: reg[22]       = 0x0000000000525245
Fri Dec 21 23:49:44 2012: ERROR: Stack trace:
Fri Dec 21 23:49:44 2012: ERROR:  1: 0x7fb078eb83b1 
<_IO_vfprintf+10737> (/lib/x86_64-linux-gnu/libc.so.6)
Fri Dec 21 23:49:44 2012: ERROR:  2: 0x7fb078f75d80 
<__vsnprintf_chk+176> (/lib/x86_64-linux-gnu/libc.so.6)
Fri Dec 21 23:49:44 2012: ERROR: End of stack trace

-=-=-

$ jackd --version
jackdmp 1.9.8
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2011 Grame.
jackdmp 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
jackdmp version 1.9.8 tmpdir /dev/shm protocol 8

$ uname -a
Linux htpc 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012 x86_64 
x86_64 x86_64 GNU/Linux

$ lspci |grep "Audio"
00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio 
Controller (rev 04)
01:00.1 Audio device: NVIDIA Corporation GF110 High Definition Audio Controller 
(rev a1)

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to jack-audio-connection-kit in Ubuntu.
https://bugs.launchpad.net/bugs/1022003

Title:
  Jack Crashes When Clicking Stop Button in QjackCtl

Status in “jack-audio-connection-kit” package in Ubuntu:
  Confirmed

Bug description:
  I'm getting this type of crash 3 out of 5 times. It happens when I
  click the Stop button in QjackCtl. Then, QjackCtl is unusable until I
  restart it.

  Everything installed from Ubuntu default repositories.

  -=-=-

  00:01:29.659 D-BUS: JACK server could not be stopped. Sorry
  Sat Jul  7 00:01:29 2012: Client 'qjackctl' with PID 2685 is out
  Sat Jul  7 00:01:29 2012: Stopping jack server...
  Sat Jul  7 00:01:29 2012: Client 'system' with PID 0 is out
  Sat Jul  7 00:01:29 2012: ERROR: Abort!
  Sat Jul  7 00:01:29 2012: ERROR: info.si_signo = 6
  Sat Jul  7 00:01:29 2012: ERROR: info.si_errno = 0
  Sat Jul  7 00:01:29 2012: ERROR: Segmentation Fault!
  Sat Jul  7 00:01:29 2012: ERROR: info.si_signo = 11
  Sat Jul  7 00:01:29 2012: ERROR: info.si_errno = 0
  Sat Jul  7 00:01:29 2012: ERROR: info.si_code  = 1 (SEGV_MAPERR)
  Sat Jul  7 00:01:29 2012: ERROR: info.si_addr  = 0x525245
  Sat Jul  7 00:01:29 2012: ERROR: reg[00]       = 
0x00007faa1ef95582
  Sat Jul  7 00:01:29 2012: ERROR: reg[01]       = 
0x0000000000000000
  Sat Jul  7 00:01:29 2012: ERROR: reg[02]       = 
0x00007faa1ef952b8
  Sat Jul  7 00:01:29 2012: ERROR: reg[03]       = 
0x0000000000000246
  Sat Jul  7 00:01:29 2012: ERROR: reg[04]       = 
0x00007faa1ef956f8
  Sat Jul  7 00:01:29 2012: ERROR: reg[05]       = 
0x0000000000413c3b
  Sat Jul  7 00:01:29 2012: ERROR: reg[06]       = 
0x0000000000000000
  Sat Jul  7 00:01:29 2012: ERROR: reg[07]       = 
0x0000000000000014
  Sat Jul  7 00:01:29 2012: ERROR: reg[08]       = 
0x0000000000525245
  Sat Jul  7 00:01:29 2012: ERROR: reg[09]       = 
0x0000000000413c4d
  Sat Jul  7 00:01:29 2012: ERROR: reg[10]       = 
0x00007faa1ef953f0
  Sat Jul  7 00:01:29 2012: ERROR: reg[11]       = 
0x00007faa1ef95400
  Sat Jul  7 00:01:29 2012: ERROR: reg[12]       = 
0x0000000000000018
  Sat Jul  7 00:01:29 2012: ERROR: reg[13]       = 
0x0000000000000000
  Sat Jul  7 00:01:29 2012: ERROR: reg[14]       = 
0xffffffffffffffff
  Sat Jul  7 00:01:29 2012: ERROR: reg[15]       = 
0x00007faa1ef94d90
  Sat Jul  7 00:01:29 2012: ERROR: reg[16]       = 
0x00007faa1dd12dba
  Sat Jul  7 00:01:29 2012: ERROR: reg[17]       = 
0x0000000000010246
  Sat Jul  7 00:01:29 2012: ERROR: reg[18]       = 
0x0000000000000033
  Sat Jul  7 00:01:29 2012: ERROR: reg[19]       = 
0x0000000000000004
  Sat Jul  7 00:01:29 2012: ERROR: reg[20]       = 
0x000000000000000e
  Sat Jul  7 00:01:29 2012: ERROR: reg[21]       = 
0x0000000080005a27
  Sat Jul  7 00:01:29 2012: ERROR: reg[22]       = 
0x0000000000525245
  Sat Jul  7 00:01:29 2012: ERROR: Stack trace:
  Sat Jul  7 00:01:29 2012: ERROR:  1: 0x7faa1dd12dba 
<_IO_vfprintf+10042> (/lib/x86_64-linux-gnu/libc.so.6)
  Sat Jul  7 00:01:29 2012: ERROR:  2: 0x7faa1ddd0580 
<__vsnprintf_chk+176> (/lib/x86_64-linux-gnu/libc.so.6)
  Sat Jul  7 00:01:29 2012: ERROR: End of stack trace

  -=-=-

  
  $ jackd --version
  jackdmp 1.9.8
  Copyright 2001-2005 Paul Davis and others.
  Copyright 2004-2011 Grame.
  jackdmp 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
  jackdmp version 1.9.8 tmpdir /dev/shm protocol 8

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