[LAU] jack don't start any more

Hi all, I have a problem with jack. Jack don't start any more. Yesterday everything was fine. I have no idea what's happens. This is the output massage of qjackctl: 10:06:21.046 Steckfeld deaktiviert. 10:06:21.073 Statistik zurückgesetzt. 10:06:21.107 ALSA-Verbindung geändert. 10:06:21.117 D-BUS: Dienst ist verfügbar (org.jackaudio.service aka jackdbus). Cannot connect to server socket err = Datei oder Verzeichnis nicht gefunden Cannot connect to server request channel jack server is not running or cannot be started 10:06:21.131 Schaubild der ALSA-Verbindungen geändert. 10:06:47.004 D-BUS: JACK-Server konnte nicht gestartet werden. Tut mir leid Thu Aug 29 10:06:30 2013: Starting jack server... Thu Aug 29 10:06:30 2013: JACK server starting in realtime mode with priority 10 Thu Aug 29 10:06:30 2013: Acquired audio card Audio0 Thu Aug 29 10:06:30 2013: creating alsa driver ... hw:DSP24|hw:DSP24|1024|2|96000|0|0|nomon|swmeter|-|32bit Thu Aug 29 10:06:30 2013: Using ALSA driver ICE1712 running on card 0 - Hoontech SoundTrack Audio DSP24 at 0xa800, irq 16 Thu Aug 29 10:06:30 2013: configuring for 96000Hz, period = 1024 frames (10.7 ms), buffer = 2 periods Thu Aug 29 10:06:30 2013: ALSA: final selected sample format for capture: 32bit integer little-endian Thu Aug 29 10:06:30 2013: ALSA: use 2 periods for capture Thu Aug 29 10:06:30 2013: ALSA: final selected sample format for playback: 32bit integer little-endian Thu Aug 29 10:06:30 2013: ALSA: use 2 periods for playback Thu Aug 29 10:06:30 2013: scan: added port hw:0,0,0 in-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:30 2013: scan: added port hw:0,0,0 out-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:30 2013: scan: added port hw:0,1,0 in-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:30 2013: scan: added port hw:0,1,0 out-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:30 2013: scan: added port hw:2,0,0 in-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:30 2013: scan: added port hw:2,0,1 in-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Thu Aug 29 10:06:30 2013: scan: added port hw:2,0,0 out-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:30 2013: scan: added port hw:2,0,1 out-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Thu Aug 29 10:06:30 2013: scan: opened port hw:0,0,0 in-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:35 2013: ERROR: JackPosixProcessSync::LockedTimedWait error usec = 5000000 err = Connection timed out Thu Aug 29 10:06:35 2013: ERROR: Driver is not running Thu Aug 29 10:06:35 2013: ERROR: Cannot open client name = dbusapi Thu Aug 29 10:06:35 2013: ERROR: failed to create dbusapi jack client Thu Aug 29 10:06:35 2013: scan: opened port hw:0,0,0 out-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:35 2013: scan: opened port hw:0,1,0 in-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:35 2013: scan: opened port hw:0,1,0 out-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:35 2013: scan: opened port hw:2,0,0 in-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:35 2013: scan: opened port hw:2,0,1 in-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Thu Aug 29 10:06:35 2013: scan: opened port hw:2,0,0 out-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:35 2013: scan: opened port hw:2,0,1 out-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Cannot connect to server socket err = Datei oder Verzeichnis nicht gefunden Cannot connect to server request channel jack server is not running or cannot be started Thu Aug 29 10:06:46 2013: ERROR: ALSA: poll time out, polled for 15999017 usecs Thu Aug 29 10:06:46 2013: ERROR: JackAudioDriver::ProcessAsync: read error, stopping... Thu Aug 29 10:06:46 2013: scan: deleted port hw:0,0,0 in-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:46 2013: scan: deleted port hw:0,0,0 out-hw-0-0-0-MIDI-1-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:46 2013: scan: deleted port hw:0,1,0 in-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:46 2013: scan: deleted port hw:0,1,0 out-hw-0-1-0-MIDI-2-Hoontech-STA-DSP24-0 Thu Aug 29 10:06:46 2013: scan: deleted port hw:2,0,0 in-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:46 2013: scan: deleted port hw:2,0,1 in-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Thu Aug 29 10:06:46 2013: scan: deleted port hw:2,0,0 out-hw-2-0-0-USB-Device-0x7104-0x2202-MIDI-1 Thu Aug 29 10:06:46 2013: scan: deleted port hw:2,0,1 out-hw-2-0-1-USB-Device-0x7104-0x2202-MIDI-2 Thu Aug 29 10:06:46 2013: Released audio card Audio0 Thu Aug 29 10:06:47 2013: Saving settings to "/home/chris/.config/jack/conf.xml" ... 10:06:49.041 Keine Verbindungsaufnahme als Client zum JACK-Server möglich. - Gesamtbetrieb schlug fehl. - Verbindungsaufnahme zum Server gescheitert. Bitte sehen Sie im Meldungsfenster nach weiteren Informationen. Cannot connect to server socket err = Datei oder Verzeichnis nicht gefunden Cannot connect to server request channel jack server is not running or cannot be started I work with KX-Studio (Ubuntu) 12.4. Any Ideas? Thanks for help. Chris