[dempseye]

In the X1 Extreme, the hdmi port is wired directly to the Nvidia card, so if you want to use an external monitor, you need to enable the card. This causes all manner of nightmares.

Gnome also used to forget monitor layouts and resolutions habitually, so plugging in a monitor didn't guarantee you'd get the same thing you got the last time, and when you plugged it out, your laptop screen could go funny.

I really don't have time or inclination to mess with this to make it work properly.