jackd crashing

[Larry Lines]

On Thu, 2007-11-08 at 13:22 -0500, Cory K. wrote:
> 
> Larry Lines wrote:
> > Hello,
> >
> > I am new to Ubuntu Studio.  Not new to Linux audio.  I love Ubuntu and 
> >the possibility of this distro looks amazing.  The install is great.  
> >The look and feel is great.  Good work to everyone involved.
> >
> > Now my problems with my Dell Inspiron 1501 AMD64 Dual Core Turion 
> >have been constant from the beginning, but overall I like the machine.  
> >But the reason I have a laptop is for studio work and I have never 
> >really been able to get this to work with jack properly.  
> >I am running the 64 bit version of Ubuntu Studio.
> >
> > Right now I have jack running with no Realtime priority.  jackd -v -d alsa
> > I can't get any sound at all.  Connected fluidsynth with a soundfont 
> >I know works on a 32 bit system to vkeybd.  Connected and rechained properly.  
> >No sound.  I know the soundcard is working.  Even if just from the sound 
> >at system startup.  And of course the messages output on jackd are the 
> >following which is bad I'm pretty sure.
> >
> > 12:16:24.568 XRUN callback (17 skipped).
> > 12:16:26.645 XRUN callback (16 skipped).
> >
> > Then if I try to start with Realtime priority.  It just core dumps.  
> >I can't actually find the core dump, but it dumps.
> >
> > :~$ jackd -R -d alsa
> >
> > jackd 0.103.0
> >
> > 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 ..
> >
> > Enhanced3DNow! detected
> >
> > SSE2 detected
> >
> > creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
> >
> > control device hw:0
> >
> > configuring for 48000Hz, period = 1024 frames, buffer = 2 periods
> >
> > ALSA: final selected sample format for capture: 32bit little-endian
> >
> > ALSA: use 2 periods for capture
> >
> > ALSA: final selected sample format for playback: 32bit little-endian
> >
> > ALSA: use 2 periods for playback
> >
> > jackd watchdog: timeout - killing jackd
> >
> > Aborted (core dumped)
> >
> > I'm committed to getting this working, so let me know if there is anything missing.
> >
> > Larry Lines
> >   
> 
> Please try using JACK Control and see if that helps.

Actually the first output from non-Realtime priority is from the
messages in jack control.  jack crashes silently in jack control with
Realtime priority.  So I went to the command line to get some output.

Thanks for your help.

Larry Lines