[PlanetCCRMA] jack trouble

[Fernando Pablo Lopez-Lezcano]

> Today I tried to start Jack, and got the following:
> 
> > [root@darkstar bruce]# jackstart -R -d alsa -d hw -r 44100
> > back from read, ret = 1 errno == Success
> > jackd 0.92.0
> > Copyright 2001-2003 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
> >
> > loading driver ..
> > creating alsa driver ... hw|hw|1024|2|44100|0|0|nomon|swmeter|rt|32bit
> > configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
> > Couldn't open hw for 32bit samples trying 16bit instead
> > Couldn't open hw for 32bit samples trying 16bit instead
> >
> >
> > **** alsa_pcm: xrun of at least 0.070 msecs
> >
> >
> >
> > **** alsa_pcm: xrun of at least 0.083 msecs
> > ...
> 
> Messages like the last two just keep scrolling on and on until I kill it.

Related to disk activity? Periodic?

> Here are my hard disk settings:
> 
> > /dev/hda:
> >  multcount    = 16 (on)
> >  IO_support   =  1 (32-bit)
> >  unmaskirq    =  1 (on)
> >  using_dma    =  1 (on)
> >  keepsettings =  0 (off)
> >  readonly     =  0 (off)
> >  readahead    =  8 (on)
> >  geometry     = 9729/255/63, sectors = 156301488, start = 0
> 
> Any ideas or suggestions?

What soundcard do you have? I would try with different hardware
parameters for jack. For example incrementing the number of periods (-p
3) and/or making the buffer size bigger (or smaller). 

-- Fernando