USB-C Hub is Out
The USB-C PD hub I have been using with my Librem 14 and Lenovo X390 just does not want to behave when connected to the Librem 14. The device itself shuts down at random and while I am curious to find out exactly why that investigation is not going to be a priority for a while.
Running the Librem 14 on USB-C power directly, and using the onboard HDMI port for video output, has proven rock solid but when involving the hub things are a bit iffy. I do wish I had remembered to bring the barrel-connector power supply that came with the laptop along for the trip across the Atlantic. I do have a USB-C to DisplayPort cable, so perhaps I will see if I have any video instability issues over that port by itself.