Subject: Re: [linux-audio-user] [OT] Jack + muse = segmentation fault
From: R Parker (rtp405_AT_yahoo.com)
Date: Wed Jul 09 2003 - 22:19:55 EEST
--- philippe <xaccrocheur_AT_halluci.net> wrote:
> Jelmer wrote:
>
> >Hi folks,
> >
> >hope somebody can help me with getting muse running
> with Jack.
> >
> (...)
>
> Well, I was ready to help you with a big daddy tone,
> but this morning
> Jack fails to start here too, and I cannot see what
> I done wrong. I'm
> using 2.4.21-0.16mm-mdk on a Cel700&320RAM laptop,
> using a poor Intel810
> card (for now)
>
> [root_AT_satellite xix]# jackd -d alsa -d hw:0 (also
> tried jackd -R -d alsa
> -d hw:0 -r 44100 -p 1024 -n 2 &)
> jackd 0.72.5
> (lisence stuff)
> JACK compiled with System V SHM support
> loading driver ..
> creating alsa driver ...
> hw:0|hw:0|1024|2|48000|nomon|swmeter|rt
> ALSA lib pcm_hw.c:866:(snd_pcm_hw_open) open
> /dev/snd/pcmC0D0p failed:
> Device or resource busy
That's the hint. Try removing the jack temporary files
from the filesystem /tmp/jack
Perhaps you've got OSS or artsd or something else
using the device--just guessing.
> jackd: pcm.c:696: snd_pcm_nonblock: Assertion `pcm'
> failed.
> received signal 6 during shutdown (ignored)
>
>
> I'd like Jack to be launched at startup, like from
> /etc/rc.d/rc.local,
> but 1st I have to fully understand what it does and
> how.
>
> #Can it be use as a standalone Audio daemon, like
> Arts or esd ?
> #In this case how to tell KDE to launch it ? Or
> better, can I start it
> BEFORE and have KDE connect to it ?
> #Is it designed to be run as root only ? Yesterday I
> managed to launch
> it as a user, and then still as a user, launch
> jack-rack that connected
> to it. Fact is, that was pretty much paradise, I'd
> like to do it again ;)
This can be done by enabling capabilities in your
kernel. I believe simple instructions are available in
the jackd faq on the website. The instructions are
there somewhere. The capabilities will enable normal
users to run jackd with -R realtime priority. jackd is
designed for pro audio so it's very strict about
having clients perform on time and if they don't
they're kicked.
> # Is there a better place to ask those Qs ?
You could try the jack dev list but the developers are
pretty busy and might not reply.
ron
> Thank you very much !
>
> pX
>
> PS - the last Moloko album "statues" rocks and damn
> SOUNDS, IMHO.
>
> --
> >--------------------
> http://www.halluci.net
> --------------------->
>
>
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