question related to this driver and virtual monitor

[realyukii]

TL;DR
is it possible to use VDD as main display on a VM? and use nvidia as its driver? because the virtual monitor that libvirt give is not approved by nvidia/windows (I'm not sure which one) and it refuses to be loaded, but it seems it demands physical/dummy plug monitor in order to work

Soooooo, I run Windows as a guest on a VM (libvirt/kvm) and I screwed up.

I accidentally disable the Microsoft Basic Display Adapter driver (at that time, I use GPU passthrough and use nvidia driver that only available after I plug the HDMI cable) and once I rebooted, the Windows can't detect HDMI and refuses to display the screen because I disabled it.

and turns out I just need to change video model from vga to virtio on libvirt xml domain setting and it will display the screen without an issue, but it prevent me from doing GPU passthrough, if I revert the changes, it just black screen and stuck like before

I tried to re-enable it on Device Driver while using virtio as video model, but the Microsoft Basic Display Adapter driver is not listed on there, it seems it only appeared when I use vga as video model, so how I'm supposed to enable it?

I found pnputil command on the Internet but it says it can't work unless the device is connected, not sure what does it mean though:

C:\Windows\System32>pnputil /enum-devices /class Display
Microsoft PnP Utility

Instance ID:                PCI\VEN_1234&DEV_1111&SUBSYS_11001AF4&REV_02\3&11583659&0&08
Device Description:         Microsoft Basic Display Adapter
Class Name:                 Display
Class GUID:                 {4d36e968-e325-11ce-bfc1-08002be10318}
Manufacturer Name:          (Standard display types)
Status:                     Disconnected
Driver Name:                display.inf

Instance ID:                PCI\VEN_10DE&DEV_2860&SUBSYS_23BD1043&REV_A1\4&253c4bb5&0&0015
Device Description:         NVIDIA GeForce RTX 4070 Laptop GPU
Class Name:                 Display
Class GUID:                 {4d36e968-e325-11ce-bfc1-08002be10318}
Manufacturer Name:          NVIDIA
Status:                     Disconnected
Driver Name:                oem23.inf

Instance ID:                PCI\VEN_1AF4&DEV_1050&SUBSYS_11001AF4&REV_01\3&11583659&0&08
Device Description:         Red Hat VirtIO GPU DOD controller
Class Name:                 Display
Class GUID:                 {4d36e968-e325-11ce-bfc1-08002be10318}
Manufacturer Name:          Red Hat, Inc.
Status:                     Started
Driver Name:                oem14.inf


C:\Windows\System32>pnputil /enable-device "PCI\VEN_1234&DEV_1111&SUBSYS_11001AF4&REV_02\3&11583659&0&08"
Microsoft PnP Utility

Failed to enable device:  PCI\VEN_1234&DEV_1111&SUBSYS_11001AF4&REV_02\3&11583659&0&08
The device is not connected.

I tried search on the Internet again and found this repository, and I install it, shutdown the vm, and change the video model to vga again, it seems booted but still black screen :"

anyone know how to just enable the driver without the device being connected? I'm sorry if this is not the right place to ask, but I'm not sure where to ask

[realyukii]

EDIT:
ah, nvm, it display the screen but just freeze, I guess the option left is to re-install, nt.

EDIT2:
after I fix the described issue above (the fix is only need to re-plug HDMI once the windows booted, lol) and re-install the VDD on vga video mode: #293 (comment)