Cheat Engine

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

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 · Posted: Mon Dec 29, 2025 2:53 pm Post subject:

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 · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

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 · Posted: Fri Jan 09, 2026 12:20 am Post subject:

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

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

Yes, booting into Windows from rEFInd works perfectly normally.

Dark Byte · Posted: Fri Jan 09, 2026 10:01 am Post subject:

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

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

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 · Posted: Fri Jan 09, 2026 10:22 am Post subject:

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)

and something else: try this vmdisk.img: https://cheatengine.org/temp/vmdisk.zip Sure, it doesn't work for your needs, but if it loads maybe you have an issue in your dbvm code

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

I have compiled DBVM before, but I have never compiled DBVMUEFI. I'm not sure what environment is required. Could you provide some hints? The motherboard is the latest ASUS model. Interestingly, it works on some older motherboards. I couldn't find an option to disable CPU cores in the motherboard settings. Do you mean the issue might be related to having too many CPU cores?

The original DBVM also has the same issue. I didn't make many modifications - I only changed that global variable related to nested virtualization to disable it.

Is it possible that it's a compatibility issue between EDK1 and EDK2?

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

After my testing, I found that after the last AP entered dbvm and returned to rEFInd, the rEFInd interface did not display, but I could use the keyboard to select and boot into Windows.

Thank you, Dark Byte.

lcineyes · Cheater Reputation: 0 Joined: 19 May 2025 Posts: 25

In addition, I found a problem: following the steps above to boot into Windows would result in the system getting stuck on the Windows logo screen. As I really had no other options, I reinstalled the system. Oddly enough, after that, when I entered DBVM, the rEFInd interface showed up properly instead.
The system was the pre-installed one that came with the PC from the manufacturer. I have no idea why these pre-installed systems would interfere with UEFI tools.