FW16 can't connect to iiyama ultrawide monitor

Hey! Thanks. Displayport now works when I connect it to slot 2. It wasn’t working before, but I’ve updated the BIOS and Adrenalin software (as default driver package doesn’t do that) since.
Okay, so there’s no charging possible via the graphics module. That’s a darn shame, as it would’ve solved my problem.
The biggest problem remains: USB-C modules on the side still don’t support my monitor. An additional problem is that, when Displayport is connected, the USB-C dock stops working, which rules out the possibility of just plugging in a Displayport and USB-C cable. So, my options currently are:

  • Connect monitor to the back of the laptop and connect an additional power cable.
  • Connect all peripherals to the laptop directly.
  • Go back to using the HP dock.

But the ideal solution is:

  • Connect the monitor via USB-C to the side, which makes power, monitor, network and keyboard work.

The main problem appears to be the automatic selection between the 780M and discrete 7700S. When the ultrawide monitor is connected, it should select the 7700S, but instead tries to run this using the 780M (and fails). Is there a way to force the system to always use the 7700S when this/an external monitor is connected? I couldn’t find any setting in BIOS or Adrenalin to achieve this. I also tried disabling the 780M in Device Manager (+ reboot), but that doesn’t work and yields even weirder results (e.g. laptop monitor not turning off when closing the lid).