Yeah, i'm sorry but i had to start a new topic because i'm lost. After reading almost all other topics (i think) regarding code 43, i cannot solve my problem. The goal is to run a Win11 VM with a gpu passed through. It's the same old song: VM works, RDP works, but no screen and code 43 error in device manager.

What i tried:

•     PCIe ACS override - every setting
•     i440fx and Q35 (down to 5.0)
•     SeaBIOS and OVMF
•     ... in every option possible
•     edited the <features> lines in vm xml
•     added 'multifunction='on' in vm xml
•     disabled C states in bios
•     server running in legacy an uefi mode
•     different cables and ports (hdmi, dvi, vga)

 

The hardware: Asus Maximus VIII HERO, i7 6700K, 32Gb ram. I tried 4 different gpu's. Granted, they are a bit old but i got them working a year ago in a win10 vm on the same platform but different motherboard. I'm guessing (hoping) there is a bios setting that i have to change but Maximus Hero's bios is... overwhelming Vt-d / VT-x is enabled.

 

How do i go from here? Any help is appreciated.

powernas-diagnostics-20230721-2313.zip win11code43.txt

Ok, we are getting somewhere... I got a Radeon 6950 from a friend, installed it and it worked!

I started from scratch with a new VM, installed windows, ran DDU (display driver uninstaller), turned off windows auto update, installed the latest drivers, rebooted and the VM worked.

 

However, i'm getting a 'code 10' now on the audio-part of the gpu. It says 'insufficient system recources exist to complete the api'.

 

Well, there is some progress...