- It's not the cable, I tried another brand new one.
- It's not the dock, I tried a spare of the same model.
- It's not the port, I tried many across the back of the motherboard.
It's not the operating system?
- Though maybe it's Debian and Lubuntu
It might be the firmware of the device, but that seems unlikely..
Fuck it, I just attached it to a Windows 10 machine.