[estebank]

Fighting the urge to debug, and failing, are they running the same software? I could see it being a hardware issue, but highly doubt it. For me it works flawlessly with an old T460 and its dock, but maybe the USB-C codepath is less robust, even today?

[ssl232]

Yeah I suspect the USB-C docking station is the guilty party. Same software, Arch and KDE.

[JamesLeonis]

For what it's worth, I had a similar problem with a USB-C dock for my Framework in KDE. Check the Thunderbolt permissions under System Settings -> Hardware. I had to do a pairing dance to get it to work correctly.