How to force VirtualBox to use native virtualization hardware

[Ricjames]

I am currently trying to boot up a VM with vagrant and I am having an issue where VirtualBox is using NEM mode(green turtle) instead of the native hardware virtualization(blue chip), even though hyper-v is completely disabled and VT-x is enabled through the BIOS. Once the VM boots up, the screen stays black. Is there anything I am missing in order to get this to work?

I am running the Ubuntu/bionic64 os

[scottgus1]

Usually we don't handle Vagrant-edited Virtualbox, beacuse Vagrant, well, changes things....

But this is in your log:

00:00:05.500287 HM: HMR3Init: Attempting fall back to NEM: VT-x is not available
00:00:05.690888 NEM: WHvCapabilityCodeHypervisorPresent is TRUE, so this might work...

So Hyper-V isn't fully disabled yet. See I have a 64bit host, but can't install 64bit guests Carefully go through each command in the 2nd & 3rd posts. Based on my perusal of successful fixes for this problem, the silver bullet appears to be the "bcdedit" command & complete power-down in post 2 point 1.