[LAU] jackd: A lot of xruns

Hi!

I want to use Jack on my Thinkpad X60s notebook with the built in
soundchip. I know that this is not the best hardware, but I need a
possibility to record some things mobile.

I get quite a few xruns every time I start jack with qjackctl -- too
many to work efficiently. I use Gentoo kernel 2.6.20-gentoo-r8,
realtime-lsm as module and the kernel option "Preemption Model
(Preemptible Kernel (Low-Latency Desktop))".

This is the output of qjackctl (I stopped Jack intentionally):

21:40:29.357 Patchbay deactivated.
21:40:29.486 Statistics reset.
21:40:29.553 MIDI connection graph change.
21:40:29.727 MIDI connection change.
21:40:31.468 Startup script...
21:40:31.468 artsshell -q terminate
21:40:32.225 Startup script terminated with exit status=256.
21:40:32.293 JACK is starting...
21:40:32.293 jackd -R -P7 -u -dalsa -r44100 -p256 -n2 -D -Chw:0 -Phw:0
21:40:32.295 JACK was started with PID=9380 (0x24a4).
jackd 0.101.1
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:0|hw:0|256|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 44100Hz, period = 256 frames, buffer = 2 periods
nperiods = 2 for capture
nperiods = 2 for playback
**** alsa_pcm: xrun of at least 0.015 msecs
**** alsa_pcm: xrun of at least 0.014 msecs
**** alsa_pcm: xrun of at least 0.016 msecs
**** alsa_pcm: xrun of at least 0.011 msecs
**** alsa_pcm: xrun of at least 0.013 msecs
**** alsa_pcm: xrun of at least 0.015 msecs
**** alsa_pcm: xrun of at least 0.011 msecs
**** alsa_pcm: xrun of at least 0.018 msecs
**** alsa_pcm: xrun of at least 0.015 msecs
**** alsa_pcm: xrun of at least 0.017 msecs
**** alsa_pcm: xrun of at least 0.011 msecs
**** alsa_pcm: xrun of at least 0.017 msecs
**** alsa_pcm: xrun of at least 0.014 msecs
**** alsa_pcm: xrun of at least 0.013 msecs
**** alsa_pcm: xrun of at least 0.014 msecs
21:40:34.356 Server configuration saved to "/home/d135-1r43/.jackdrc".
21:40:34.357 Statistics reset.
21:40:34.380 Client activated.
21:40:34.382 Audio connection change.
21:40:34.391 Audio connection graph change.
**** alsa_pcm: xrun of at least 0.015 msecs
**** alsa_pcm: xrun of at least 0.039 msecs
21:40:34.446 XRUN callback (1).
**** alsa_pcm: xrun of at least 0.013 msecs
**** alsa_pcm: xrun of at least 0.015 msecs
**** alsa_pcm: xrun of at least 0.017 msecs
**** alsa_pcm: xrun of at least 0.011 msecs
**** alsa_pcm: xrun of at least 0.026 msecs
**** alsa_pcm: xrun of at least 0.010 msecs
**** alsa_pcm: xrun of at least 0.014 msecs
**** alsa_pcm: xrun of at least 0.016 msecs
**** alsa_pcm: xrun of at least 0.016 msecs
**** alsa_pcm: xrun of at least 0.016 msecs
**** alsa_pcm: xrun of at least 0.014 msecs
**** alsa_pcm: xrun of at least 0.010 msecs
**** alsa_pcm: xrun of at least 0.011 msecs
21:40:35.649 Client deactivated.
21:40:35.651 JACK is stopping...
jack main caught signal 15
no message buffer overruns
21:40:35.904 JACK was stopped successfully.
21:40:35.907 Post-shutdown script...
21:40:35.907 killall jackd
jackd: no process killed
21:40:36.242 Post-shutdown script terminated with exit status=25

These are my cards:

 # cat /proc/asound/cards
 0 [Intel ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xee240000 irq 22

 # lspci | grep Audio
 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller (rev 02)

What to do? Are there some things to tweak?

Markus
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Received on Thu Jun 14 00:15:01 2007