[Bug 398209] [NEW] Rosegarden does not play midi: Jack error

[ClaudioRJ]

Public bug reported:

Binary package hint: qjackctl

I use to study music, when Windows was my OS, with Encore application.
When I finally moved to Ubuntu I never have to study music anymore.
Since now. I looked for some Linux application that could read a .mid
file and not only beeing able to play it, but to separate voices so I
could mute some in other to study others.

I've found Rosegarden, a great application, and I noticed that it fits
to my necessities.


But, when I run Rosegarden I get this message:
"Failed to connect to JACK audio server.

Rosegarden could not connect to the JACK audio server. This probably
means JACK server is not running.

If you want to be able to play or record audio files or use plugins, you
should exit Rosegarden and start the JACK server before running
Rosegarden again."


And as Rosegarden comes up to memory, a Jack Audio Connection Kit (qjackctl application) also is initialized. And I think that this app is intended to start the audio server. But, after trying to do so, it shows an error message box (title: Error - JACK Audio Connection Kit):
" Could not connect to JACK server as client.
- Overall operation failed.
- Unable to connect to server.
Please check the messages window for more info."

The messages windows says:
"13:33:47.858 Patchbay deactivated.
13:33:48.729 Statistics reset.
13:33:48.866 Startup script...
13:33:48.868 artsshell -q terminate
13:33:48.872 ALSA connection graph change.
sh: artsshell: not found
13:33:49.527 Startup script terminated with exit status=32512.
13:33:49.528 JACK is starting...
13:33:49.528 /usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p1024 -n2
13:33:49.568 JACK was started with PID=15544.
no message buffer overruns
jackd 0.116.1
Copyright 2001-2005 Paul Davis 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
JACK compiled with System V SHM support.
cannot use real-time scheduling (FIFO at priority 10) [for thread -1212qjackctl430656, from thread -1212430656] (1: Operation not permitted)
cannot create engine
13:33:49.581 JACK was stopped successfully.
13:33:49.581 Post-shutdown script...
13:33:49.582 killall jackd
13:33:49.766 ALSA connection change.
jackd: nenhum processo morreu
13:33:50.017 Post-shutdown script terminated with exit status=256.
13:33:51.800 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info."


As I'm not an expert in Linux, and I'm an Ubuntu fan, I really would like to know how can I smoothly play my midi files among Rosegarden app without doing anything more technically unknown to me.

My environment:
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/qjackctl
Uname: Linux 2.6.28-13-generic

** Affects: qjackctl (Ubuntu)
     Importance: Undecided
         Status: New

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Rosegarden does not play midi: Jack error
https://bugs.launchpad.net/bugs/398209
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