Comments on: How to Enable Nested Virtualization in VirtualBox on Linux

By: Clark

Clark — Wed, 19 Aug 2020 17:34:49 +0000

In reply to Sainster.

Perhaps this will solve your problem too.

My host OS was Windows 10 (build 2004 – April 2020) that I was running VirtualBox on (as opposed to a Linux host in the article). I had this same error, “Cannot enable nested VT-x/AMD-V without nested-paging and unresricted guest execution!”.

Then I found this thread: ‘https://nullrend.com/11909/verr_cpum_invalid_hwvirt_config/’

The problem I was having was that Windows Hyper-V was interfering with VirtualBox. Perhaps this can happen on other host OSes too where another hypervisor, like KVM, interferes with VirtualBox.

My problem was fixed once I executed the following command and rebooted my Windows 10 host:

Disable-WindowsOptionalFeature -online -FeatureName VirtualMachinePlatform

By: Hasbullah Marwan

Hasbullah Marwan — Mon, 13 Jul 2020 02:22:38 +0000

i create vm in vbox to running docker, but its containers can’t ping outsite the world. i think it cause nested is disabled. but after i enable i have same problem

By: Sainster

Sainster — Tue, 05 May 2020 22:31:39 +0000

Hello I tried enabling the nested virtualization but got an error: “Cannot enable nested VT-x/AMD-V without nested-paging and unrestricted guest execution! (VERR_CPUM_INVALID_HWVIRT_CONFIG). Result Code: NS_ERROR_FAILURE (0x80004005) Component: ConsoleWrap Interface: IConsole {etc…}. Tried executing command you wrote with sudo and still it won’t open in VB. Any ideas? Thanks

By: Bruce Ferrell

Bruce Ferrell — Tue, 10 Mar 2020 23:02:57 +0000

Here is an official confirmation in VirtualBox doc: ‘https://www.virtualbox.org/manual/ch03.html’ Chapter 3.5.2. Processor Tab

Enable Nested VT-x/AMD-V: Enables nested virtualization, with passthrough of hardware virtualization functions to the guest VM.

This feature is available on host systems that use an AMD CPU. For Intel CPUs, the option is grayed out.

And I can confirm, it doesn’t work on Intel(R) Xeon(R) CPU E5540