Jack rt problems in hardy

[rob free]

Hi

what would you suggest then compiling a kernel with the options
mentioned in the link you sent? or maybe switching to another distro? I
dont have the standard kernel installed. Is it worth installing is it
usable in terms of latency without xruns?

On Tue, 2008-05-13 at 11:51 +0200, atuc wrote:
> hallo
> 
> i also have problems with the rt kernel on hardy and my usb m-audio
> fasttrack, the standard kernel works better for me.
> 
> i found this:
> 
> http://ubuntuforums.org/showthread.php?t=781104
> 
> alex
> 
> > Hi everyone,
> > I'm having lots of trouble running jack (from jackQtl) in ubuntu studio
> > 8.04 . I am using a USB sound card : Alesis io2 and Jack Xruns like
> > crazy on all settings! I get some error messages at start up :
> >
> >
> >
> > 11:01:39.739 Startup script terminated with exit status=256.
> >
> > 11:01:39.740 JACK is starting...
> >
> > 11:01:39.740 /usr/bin/jackd -R -P70 -dalsa -dhw:1 -r48000 -p128 -n3 -D
> > -Chw:1 -i2 -o2
> >
> > 11:01:39.744 JACK was started with PID=7429.
> >
> > jackd 0.109.2
> >
> > 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.
> >
> > cannot lock down memory for jackd (Cannot allocate memory)
> >
> > loading driver ..
> >
> > apparent rate = 48000
> >
> > creating alsa driver ... hw:1|hw:1|128|3|48000|2|2|nomon|swmeter|-|32bit
> >
> > control device hw:1
> >
> > configuring for 48000Hz, period = 128 frames (2.7 ms), buffer = 3
> > periods
> >
> > ALSA: final selected sample format for capture: 24bit little-endian
> >
> > ALSA: use 3 periods for capture
> >
> > ALSA: final selected sample format for playback: 24bit little-endian
> >
> > ALSA: use 3 periods for playback
> >
> > JACK: unable to mlock() port buffers: Cannot allocate memory
> >
> > JACK: unable to mlock() port buffers: Cannot allocate memory
> >
> > 11:01:41.796 Server configuration saved to "/home/rob/.jackdrc".
> >
> > 11:01:41.797 Statistics reset.
> >
> > 11:01:41.799 Client activated.
> >
> > 11:01:41.800 JACK connection change.
> >
> > 11:01:41.804 JACK connection graph change.
> >
> > cannot lock down memory for RT thread (Cannot allocate memory)
> >
> > 11:01:56.259 XRUN callback (1).
> >
> >
> >
> > Does anyone know why jack cannot allocate memory? Any suggestions?
> > Thanks for your time!
> > Robin
> >
> >
> 
>