[Pkg-mpd-maintainers] Bug#655482: mpd: output: Failed to enable "muzyka" [jack]: Failed to connect to JACK server, status=17

[01]

Package: mpd
Version: 0.16.5-1

Hi,

I try to make work mpd with its native Jack output.

- It works with ALSA when no other sound app is running
- My JACK setup works well with other apps, I use an external
  USB soundcard.

My config is simple:

(...)
audio_output {
        type            "jack"
        name            "muzyka"
}
(...)

Reference: http://mpd.wikia.com/wiki/Configuration#Audio_Outputs

Check:
% mpc outputs 
Output 1 (My ALSA Device) is enabled
Output 2 (muzyka) is enabled


In /var/log/mpd.conf, I repeatedly have stuff like:

Jan 11 16:56 : jack: jack server is not running or cannot be started
Jan 11 16:56 : output: Failed to enable "muzyka" [jack]: Failed to
connect to JACK server, status=17
Jan 11 16:56 : jack: Cannot connect to server socket err = No such file
or directory
Jan 11 16:56 : jack: Cannot connect to server socket
Jan 11 16:56 : jack: jack server is not running or cannot be started
Jan 11 16:56 : output: Failed to enable "muzyka" [jack]: Failed to
connect to JACK server, status=17
Jan 11 16:56 : player_thread: problems opening audio device while
playing "musique/kanibal 02 malaria - untitled/01-Malaria-A1
- Snif.mp3"


The only reference for this error I found on google is:
http://permalink.gmane.org/gmane.comp.audio.musicpd.devel/1628

I manually added 'mpd' user to 'audio' group in case it was a
permision problem, but that doesn't help.

% uname -a
Linux cacacomp 3.1.0-1-amd64 #1 SMP Fri Dec 23 16:37:11 UTC 2011 x86_64
GNU/Linux

Cheers,

01.