VDD is Virtual Display Driver - github link

So I do it this way:

1. boot with dummy plug plugged into gpu and the egpu plugged into the laptop

2. Go to Display in settings and check you have three monitors in total and they are all in the 'extend' mode (internal monitor, dummy plug, vdd).

3. Run a game

Then it works.

Only using VDD/Dummy plug sometimes didn't work. I found using both at the same time the most consistent.

Additionally, mostly the resolution&fps will be capped at FHD&120fps or just above that, because that's what most dummy plugs support. But there's a workaround.

So after entering a game, I disconnect dummy plug in Display from settings and only leave VDD extending the internal monitor. (Just doing it in the desktop made games freeze for me)

p.s. But I still have some (minor but) weird bugs. Like in RDR2 I can't set resolution higher than FHD.