starting jack from an ssh session - dbus problem

[Athanasios Silis]

hello everyone,
I am on a ubuntustudio64 - 13.04 system.
I would like to be able to start the jack daemon from an ssh on occasions.
I stumble upon DBUS though.

***@starkill:~$ jackd -S -dalsa -dhw:1,0 -r44100 -p128 -n2
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

jackd: ../dbus/reserve.c:391: rd_acquire: Assertion `0' failed.
Aborted (core dumped)


is there a switch to disable dbus? can I (and should I) compile a version
of jack in another folder without dbus and run this instead?

Thank you for your help

[Sam Hanes]

Post by Athanasios Silis
I am on a ubuntustudio64 - 13.04 system.
I would like to be able to start the jack daemon from an ssh on occasions.
I stumble upon DBUS though.
[snip]
Failed to connect to session bus for device reservation Unable to
autolaunch a dbus-daemon without a $DISPLAY for X11
is there a switch to disable dbus? can I (and should I) compile a
version of jack in another folder without dbus and run this instead?

Reading the documentation, it doesn't appear that there's a command-line
switch to disable dbus support. I didn't check the source code, though,
so there may be one that's just undocumented.

http://trac.jackaudio.org/wiki/JackDbusPackaging
http://manpages.ubuntu.com/manpages/raring/en/man1/jackd.1.html

Since you're running Ubuntu Studio, I'm guessing you have X running.
That is, the machine on which you're trying to run JACK has a graphical
interface. You just don't have DISPLAY set because your shell is being
started by sshd and not in the process tree of a graphical session. If
you have a logged in session under X you should be able to connect to it
by setting DISPLAY yourself:
$ export DISPLAY=:0.1

If that doesn't help, or if you don't have an active X session, you can
start the dbus daemon manually:
$ dbus-daemon --session

Once you have the dbus daemon running JACK should no longer need X to
auto-start it (I think). For more information on dbus-daemon see:

http://manpages.ubuntu.com/manpages/raring/en/man1/dbus-daemon.1.html

--
Sam Hanes
***@maltera.com