I'm using systemd-nspawn to "boot" a second Linux OS from a USB hard disk. I'd like to launch that OS's Gnome Desktop in a second X server running on the same machine on a different tty than the Desktop that is already running on tty1.
e.g. I have Gnome on tty1 running on the host machine. I'd like to launch the USB drive's KDE desktop in tty2 (in a 2nd X server I'm assuming). It seems possible somehow.
How can it be done?