I’m running into the real-time scheduling issue with JACK (operation not permitted).
Specifically, the console logs the following when trying to start a session in Ardour:
Log Messages: ERROR: JACK: Cannot use real-time scheduling (RR/5) (1: Operation not permitted) ERROR: JACK: JackClient::AcquireSelfRealTime error INFO: Loading menus from /etc/ardour6/ardour.menus ERROR: JACK: Cannot create thread res = 1
I did choose “Yes” for real-time priority when installing jack, and QJackCtl starts the jack server with “real-time” checked, so it seems the issue is with Ardour.
I’ve followed various instructions about setting real-time priority values in several different daemon *.conf files and added myself as a user to the audio group… all to no avail.