Review on Lenovo ThinkPad UltraDock 40A90090US Packaged by Daniel Drury

Works great on my 5th Gen X1 Carbon on Arch Linux. No additional drivers required. The only slight disappointment is that this dock only supports a maximum of two 60Hz, 1920 x 1080 resolution monitors, which isn't entirely clear unless you do a little digging. If you want more, you can use just one monitor. The dock simply rejects any configuration with more pixels. However, this is not so important; I just connect my external 1440p monitor to HDMI on the laptop. Having two cables attached is still way better than the cobwebs I had prior to purchasing this dock.