I have a X1 Carbon 5th generation with Ubuntu 17.04.

I'm very satisfied, the installation was easy, everything is working correctly, apart the fingerprint reader but biometric is a joke so no big loss.

The biggest problem with this machine is the fan system, it's configured at a pretty conservative temperature and when the fan start, it does a 1-2 seconds at almost full speed which is noisy.

The ports are just right for me, an hdmi port, two usb-3 and two usb-c which will make my life so much better when I will buy this screen/usb-c dock: http://www.philips.co.uk/c-p/258B6QUEB_00/brilliance-lcd-mon.... With an unique cable I will have everything I need when working from my desk: power, video, audio, ethernet, keyboard and mouse!