None of these worked I checked that the jack module had been installed – change to astrisk src directory and make menuselect -it was installed correctly

allows me to control the desktop of my Ubuntu machines from a MAC. the software of choice is X11VNC – reasonably easy to enable just a few stumbles to get it to load at boot – code below is copied from here https://tecadmin.net/setup-x11vnc-server-on-ubuntu-linuxmint/