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View Full Version : [ubuntu_studio] jack server won't start.



Niels Olson
January 17th, 2012, 12:07 AM
Hi. Qjackctl can't get the server to start. I have a condenser mic going into an m-audio mobile pre on hw:2 and the internal soundcard on hw:3 sending output to an amplifier. I want to speak into the mic, and hear my voice amplified. I have read many threads, and tried many configs. It worked once somewhere in the middle, and promptly never worked again. What should I do?


14:58:13.197 D-BUS: JACK server could not be started. Sorry
Mon Jan 16 14:58:12 2012: Saving settings to "/home/niels/.config/jack/conf.xml" ...
...
Mon Jan 16 14:58:12 2012: driver "alsa" selected
...
Mon Jan 16 14:58:12 2012: Saving settings to "/home/niels/.config/jack/conf.xml" ...
Mon Jan 16 14:58:12 2012: Starting jack server...
Mon Jan 16 14:58:12 2012: JACK server starting in realtime mode with priority 10
Mon Jan 16 14:58:13 2012: control device hw:2
Mon Jan 16 14:58:13 2012: control device hw:3
Mon Jan 16 14:58:13 2012: ERROR: Failed to acquire device name : Audio2 error : Input/output error
Mon Jan 16 14:58:13 2012: ERROR: Audio device hw:2 cannot be acquired, trying to open it anyway...
Mon Jan 16 14:58:13 2012: ERROR: Failed to acquire device name : Audio3 error : Input/output error
Mon Jan 16 14:58:13 2012: ERROR: Audio device hw:3 cannot be acquired, trying to open it anyway...
Mon Jan 16 14:58:13 2012: creating alsa driver ... hw:3|hw:2|1024|3|44100|1|1|nomon|swmeter|-|32bit
Mon Jan 16 14:58:13 2012: control device hw:3
Mon Jan 16 14:58:13 2012: configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 3 periods
Mon Jan 16 14:58:13 2012: ALSA: final selected sample format for capture: 24bit little-endian
Mon Jan 16 14:58:13 2012: ERROR: ALSA: cannot set channel count to 1 for capture
Mon Jan 16 14:58:13 2012: ERROR: ALSA: cannot configure capture channel
Mon Jan 16 14:58:13 2012: ERROR: Cannot initialize driver
Mon Jan 16 14:58:13 2012: ERROR: JackServer::Open() failed with -1
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
Mon Jan 16 14:58:13 2012: ERROR: Failed to open server
14:58:16.444 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info.
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started

CivilizationII
February 20th, 2012, 04:46 PM
You need to force the hardware interface selected. PLease look at http://ubuntuforums.org/showthread.php?t=1919665#4