when i use ardour jack has unkown error and when i stop jack and chenge output / input device setting
jack runs for a few min & again return error (set & error in below scrshotz)
What version of Ardour is this? Where did you get it? What is going on in the session?
i compile from github source in avlinux 64bit
You would need to very that the same issue occurs with the free/demo build from nightly.ardour.org before we look any deeper.