I guess this might be a very far off topic: I'm trying to get qtractor to run on a liberated ARM based chromebook running ubuntu 22.04 with xfce.
What works: starting jackd on the command line "jackd -r -d alsa" - after - starting qjackctl ( without hitting the start button! ). Then I can start qsynth and some midi program like tuxguitar, use the graph view of qjackctl to connect/disconnect the midi port to qsynth and have midi playback on/off by changing the connection in qjackctl. So the basic functionality of jack audio seems to work and even that part of qjackctl. No xrun errors even.
As soon as I hit the start button on qjackctl - even when adjusting the settings so that the command should be the jackd command that works on the command line - qjackctl just crashes with the output "aborted" on the command line. When I hit that start button qjackctl starts a jackd process before it crashes though. So I do not think the problem is in running the jack demon.
Same is true for qtractor, as it also tries to restart the jackd upon firing up - which leads to the very same crash/error message "aborted".
However the jackd I have running in a terminal outputs this when qtractor tries to communicate with it:
Cannot write socket fd = 17 err = Broken pipe
CheckRes error
Could not write notification
ClientNotify fails name = Qtractor notification = 10 val1 = 3 val2 = 0
Cannot write socket fd = 17 err = Broken pipe
CheckRes error
Which tells me that qtractor knows how to reach jackd, but for some reason jackd can't answer ... and I have no idea how to figure out what the issue might be...
Any ideas what I could try?