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Old 03-24-2011, 05:56 AM   #1
LQ Newbie
Registered: Aug 2006
Location: Croatia
Distribution: Arch Linux (rolling release)
Posts: 26

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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:
$ jackd -d alsa
jackd 0.120.1
Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others.
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/': 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...
$ 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!


jack, kde, kde4

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