Black Screen on all VMS

[johnnydoe]

I am facing issue with my new threadripper system
My old backups of VMs are throwing black screen and I tried creating new ones and have same error

I have 2 4080 gpu with debian 12 as the host

I tried downgrading to virtual box 6 and the same error , changed and checked all graphics controller but still same error
I am using Latest Production Branch Version: 550.67 nvidia drivers
logs in the attachments as It exceeds the character limit

[johnnydoe]

Maybe something to do with KVM ?

NOTE: I have tried increasing the cpu and ram limit and the black screen of death still persists.

[johnnydoe]

Can anyone help me ?

[johnnydoe]

Fixed :

Disable PAE/NX AND NESTED VT-x/AMD -V in system > processor
Go to Acceleration , Select KVM and disable Nested Paging

This will fix the black screen