[LAD] Failed to connect to session bus for device reservation

[Fokke de Jong]

Hi Guys,

I’m trying to set up a minimal audio system (without X11) based on the ubuntu mini-iso.

When trying to start jack, i get this dbus error message:

...
sudo /usr/bin/jackd -p512 -dalsa -r48000 -p64 -n2 -D -Chw:MADIFXtest -Phw:MADIFXtest
jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2013 Grame.
jackdmp 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
no message buffer overruns
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
Failed to connect to session bus for device reservation Unable to autolaunch a dbus-daemon without a $DISPLAY for X11

Audio device hw:MADIFXtest cannot be acquired...
Cannot initialize driver
JackServer::Open failed with -1
Failed to open server
...


I’ve seen others mention the error but have not really found a solution. I guess part of the problem is that I’m not really sure what the error means :-) 
So if anyone could be so kind to enlighten me? 



cheers,
Fokke