Cheat Engine

[lcineyes]

On an ASUS motherboard, loading DBVM via UEFI with Secure Boot already disabled sometimes freezes when the first CPU enters DBVM, and other times when the last CPU enters DBVM. In all cases, it freezes during the call to enterVMMPrologue.

cpu: intel i7 12700K

[Dark Byte]

try disabling bitlocker encryption for your disk

and if that fails, try disabling uefi to see if it's some kind of uefi protection or not or something else

[lcineyes]

I found that all APs have entered virtualization and eventually got stuck, without returning to the UEFI menu. Could the issue be with this line: SystemTable->BootServices->Exit(ImageHandle, 1, 0, NULL);? It's an ASUS motherboard.

[Dark Byte]

does refind boot windows normally if you don't boot launch dbvm?

[lcineyes]

Yes, booting into Windows from rEFInd works perfectly normally.

[Dark Byte]

does it return to refind after loading or does it break before that ? (2?)

[lcineyes]

This CPU has 24 cores (0-23). 23 APs have successfully entered virtualization, but the system halts at this point. When I press Enter, it re-enters DBVM (I have made some modifications to DBVM, disabling nested virtualization), which is why it gets stuck as shown in the second screenshot.

This issue occurs on some motherboards while working normally on others.

[Dark Byte]

are you capable of compiling DBVMUEFI? If so, try making the LaunchDBVM and LaunchDBVMAP return immediately instead of loading DBVM. That way you can check if it's due to launching the AP processors that returning to the original uefi loader fails (maybe the uefi on the bad motherboards kills some pointers after that)

And maybe if you disable some cores it will work ? (maybe a cpucount overflow)