I’m on ubuntu 22.04.
I installed Ardour 8.1 using flatpak.
I can start Ardour by going to ‘show applications’ and then typing ‘ardour’.
An ardour process runs. But no GUI appears.
If, from a terminal emulator I do:
flatpak run org.ardour.Ardour
… then the command returns and hangs. It’s as if the program is running, but just not doing anything.
This is the most likely cause of your issue:
You aren’t going to point out that Flatpak is discouraged? Or are some distributions getting enough plugins packaged in Flatpak that it is somewhat usable now?
I thought I’d leave that for you
But yes, of course, flatpak is discouraged, using 3rd party (notably non-FLOSS) plugins will be harder to impossible.