Problem fixed. Same problem as described here : http://ubuntuforums.org/showthread.php?t=1637399
Still it s unclear why it seems that everything is working when you look at the Qjackctl graphic interface even if actually the jack server is not.
Problem fixed. Same problem as described here : ubuntuforums. org/showthread. php?t=1637399
http://
Still it s unclear why it seems that everything is working when you look at the Qjackctl graphic interface even if actually the jack server is not.