I should finish my post on the 1st Gen X1 carbon I got used. I was able to run FreeBSD on it, but after a while it just started crashing randomly and I got an error when trying to update the bios.

I did buy it used so it could have just been a problem inherited from its previous owners. It worked well for the short time it did work.

I got another one when I switched teams at work, but the last guy had taken it with him on a boat and it got wet. The touchpad didn't work and the lower left screen was discoloured. I didn't use it very much.