"Disconnect from jack"

When using Ardour3 to launch jack, i can’t seem to “disconnect from jack” any more once the session is loaded. Am I missing something?

It’s useful to be able to disconnect, so that I can suspend the laptop. Launching jack externally does work, but Ardour actually handles my venerable UA-25 better than qjackctl.

This was discussed here a few years back, is there anything new on jack and suspend-to-RAM?

Windows > Audio/MIDI Setup