Use of USB port on GPU Expansion Module

I’d love to use the dGPU’s DP video out, but unsure if I need to buy a cable or if I can just plug my DP module into it?

I thought I’d try the module (got 2) and had some mixed success…

  • intermittently worked after a reboot, would not work if plugged in after booted up
  • by intermittently I mean SDDM would never launch driving both the laptop display and external monitor… post login would either bring a successful load with two displays, or would fail and dump be back to SDDM

With DP connected to the side (a second dp module), SDDM always loads with two screen (iGPU).

So either:

  • I should be able to use the DP module attached to the dGPU, but I have a bad one, or
  • I need to go buy a USB-C to DP cable to properly driver my monitor