[linux-audio-user] can't get jack working in SuSE 9.1

[Robert Persson]

On Tuesday 30 November 2004 16:08, Lee Revell wrote:

> This is because you are running /usr/bin/jackd and it must be linking
> against the newer JACK libraries.  The CVS version installs
> as /usr/local/bin/jackd.

Excellent!  It's working now.  Needs a few tweaks naturally, but that can 
wait.

To summarise (for the benefit of other beginners), I got Jack working by 
taking the following steps:
1.  Compile the realtime-lsm module.  It ships with some distros, else you can 
get if from http://sourceforge.net/projects/realtime-lsm/.  This also 
required me to recompile my kernel with some SELinux functions enabled, but 
the instructions are easy to follow.
2.  Compile the latest jack version from CVS (http://jackit.sourceforge.net).  
This probably won't be necessary in a few months because what's in the CVS 
now will eventually become the official version.  Again, the instructions are 
easy to follow. You just have to remember that the CVS jackd will be 
installed into /usr/local/bin and won't replace /usr/bin/jackd unless you 
decide to do it manually.
3.  Make sure that jackd is not competing with another sound server.  With 
artsd (the KDE sound server) you can either kill it when you start jackd and 
start it again when you have finished (qjackctl can do this automatically), 
or run jackd all the time and set artsd in KDE Control to treat jackd as its 
audio device instead of using alsa directly.

One potential area of confusion:
If you start a Jack-using audio application and you get the message "Direct 
access to sound device not possible" it does not mean that anything is wrong 
with your software. It simply means that you have yet to patch the 
application's audio outputs to something else's inputs using qjackctrl or 
another Jack patchbay.

Robert

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