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Wintershade 03-24-2011 05:56 AM

How to start JACK with KDE 4? (and which JACK should I use?)
 
Hi again :)

I'm using KDE 4 on Arch Linux, and I've just installed JACK again, and since I can't find any decent documentation on this, I'm having a bit of a problem.
Currently I have jack from [extra] installed, rather than jack2. When I try starting jack as the ArchWiki suggests, i.e. by typing "jackd -d alsa", I get the following error:
Code:

$ jackd -d alsa
jackd 0.120.1
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn 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

could not open driver .so '/usr/lib/jack/jack_firewire.so': libffado.so.2: cannot open shared object file: No such file or directory

JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0                                                                                                                                             
the playback device "hw:0" is already in use. Please stop the application using it and run JACK again                                                           
cannot load driver module alsa


I've also tried jack2 from [community], and after starting it with "jack_control start", I get this...
Code:

$ jack_control start
--- start
DBus exception: org.jackaudio.Error.Generic: Failed to start server


So how do I start it? I'm guessing jack doesn't want to start because some other KDE application grabbed alsa before jackd (but I've been wrong before), and I don't have the slightest idea what jack2 is about with that "generic" error. If anyone would help me shed some light on this, I'd appreciate it a lot.

Thanks in advance! :)


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