jackd crashing

[Gustin Johnson]

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Clicking on messages in jack control will give you output.

Essentially you should be using a realtime kernel to use the realtime
option.

You may wish to increase your periods/buffer (under settings in jack
control) to 4.  This is what I use for the integrated sound device on my
Turion based laptop.

Larry Lines wrote:
> 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
> 
> 
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