[Jack-Devel] How to use jackd as a 'system-wide' server?

[Christophe Lohr]

Many thanks all four your advices.
I start jackd in promisuous mode.

I created a Unix group named 'jack-access', with all participants for
the task (including the asterisk user)
I set  JACK_PROMISCUOUS_SERVER=jack-access  everywhere (including within
the systemd script for asterisk)
I can check that this environment variable is really set via  
/proc/<asterisk pid>/environ
All participants are able to execute  jack_mixer
So all participants are able to reach the jackd server.

Unfortunately I still have errors when I place a call to this asterisk
channel:
    ../..
    -- Executing [6000 at default:5] JACK("SIP/6007-00000003", "") in new stack
[May 10 13:34:25] NOTICE[2899][C-00000003]: app_jack.c:192
log_jack_status: Client Open Status: Failure, Server Error
  == Spawn extension (default, 6000, 5) exited non-zero on
'SIP/6007-00000003'
  ../..

How can I get more log messages from the jackd server?

Best regards
Christophe