Jack does not connect anymore


I am proud to be member of this community because I like Ardour and Ubuntu studio a lot.

Yesterday I installed Ardour 3 on my ubuntu studio system (10.04). Ardour 2 was working with Jack satisfying. Ardour 3 was a chellenge. But now Jack server seems to be running, but the client is not able to connect to it. I was asked for update to jackd 0.121.3 and I did from the resource.

Starting Jack audio connection kit fails in connecting to the server.
I would be very happy, if anybody coud give me a hint.

I am sorry, the log is German.

08:09:06.847 Protokollierung gestartet --- Di. Apr 16 08:09:06 2013 --- 08:09:06.871 Steckfeld deaktiviert. 08:09:06.918 Statistik zurückgesetzt. 08:09:06.939 Schaubild der ALSA-Verbindungen geändert. 08:09:07.134 ALSA-Verbindung geändert. 08:09:11.297 JACK startet... 08:09:11.298 /usr/bin/jackd -v -t9999 -dalsa -dhw:0 -r44100 -p128 -n2 -zs 08:09:11.325 JACK wurde mit PID = 3409 gestartet. 08:09:11.327 JACK wurde angehalten mit Rückgabewert = 1. 08:09:11.328 Post-shutdown script... 08:09:11.328 killall jackd jackd 0.121.3 Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn 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 getting driver descriptor from /usr/lib64/jack/jack_dummy.so getting driver descriptor from /usr/lib64/jack/jack_net.so getting driver descriptor from /usr/lib64/jack/jack_firewire.so no message buffer overruns getting driver descriptor from /usr/lib64/jack/jack_alsa.so getting driver descriptor from /usr/lib64/jack/jack_oss.so Unknownage with option 'd' Options for driver 'alsa': -C, --capture capture ports. Optionally set device (default: none) -n, -- ports. Optionally set device (default: none) --- un handling (default: none) -m, -- r the output (default: none) -jackd: Kein Prozess gefunden 08:09:11.738 Post-shutdown script terminated mit Rückgabewert = 256. 08:09:13.363 Keine Verbindungsaufnahme als Client zum JACK-Server möglich. - Overall operation failed. - Verbindungsaufnahme zum Server gescheitert. Bitte sehen Sie im Meldungsfenster nach weiteren Informationen.

The limits.conf tells this part:

@audio - rtprio 99
@audio - memlock 3084192
@audio - nice -10

The audio group has the current user (oslt) as member:

Please join us on IRC (see the Support page for details) sometime during US daytime hours (approx 13h GMT -5h to 04h GMT -5h). It is not sensible to try to analyse or this problem via a web forum. My name on IRC is “las” though there may be others who might offer help as well.