How to achieve fast user switching with multiple graphics adapters, prevent virtual terminal switch?

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http://unix.stackexchange.com – My boxen has two video nVidia graphics adapters which I'd like to assign to separate seats, including virtual terminals. This question most likely isn't display manager specific, but in this case I'm using lightdm-1.2.2 to set up an instance on top of a secondary video card. [SeatDefaults] xserver-command=X -sharevts -isolateDevice PCI:0:2:0 #xserver-layout= xserver-config=xorg-6600.conf [LightDM] #start-default-seat=true #greeter-user=lightdm minimum-display-number=6 minimum-vt=7 This is how it launches: [+0.00s] DEBUG: Launching process 10099: /usr/bin/X -sharevts -isolateDevice PCI:0:2 (HowTos)