[PlanetCCRMA] Jack Problems

Fernando Pablo Lopez-Lezcano nando@ccrma.Stanford.EDU
Sat Nov 16 11:14:01 2002

> I can't get jack to run.  I keep getting the following when I run 
> jackstart -R -d alsa -d hw -r 44100:  jackd watchdog:  timeout  - 
>  killingjackd.  Any ideas?

No really, I have not seen this happen (actually I've seen a couple of
watchdog timeouts but while using jack, not when starting it). 

Things you could try:

- check that there are no stray jack processes, for that do a:
  ps axuw|grep jack
  if jack is running you will see something like this:

nando     1298  0.1  0.0  1764  468 pts/1    S    11:06   0:00 jackstart
-R -d alsa -d hw
nando     1300  1.9  7.0 36192 36176 pts/1   SL   11:06   0:00 jackstart
-R -d alsa -d hw

  the second number in each line is the process id, you can use that
number to kill the process as in:

  kill 1298 1300 

- try to start it without using real time priority:
  jackstart -d alsa -d hw -r 44100

- try to start jack as root (I don't why it would make a difference)
  su root (and enter the root password)
  jackd -d alsa -d hw -r 44100

- use the "-v" argument to see more of what is happening:
  jackstart -v -R -d alsa -d hw -d 44100

What soundcard are you using?
-- Fernando