Invalid setting detected

[vbuseruservb]

Hi,

My base OS is Ubuntu 20.
On it I have VirtualBox.
virtualbox-6.1_6.1.6-137129~Ubuntu~eoan_amd64.deb
I have installed whonix (anonymity os) inside the first virtualbox.

I then have another virtualbox installed on whonix [workstation] .
In that VirtualBox I am trying to run Kali Linux.

I have tried both using the IOS and the .OVA files.
I keep getting the same error message.
When I try to correct it using the given directions the OK button
to save the changed settings remains grayed out so I can't make and save the new setting.

Then when I start virtual machine with invalid settings detected error I get this VT error.

<quote> "
Failed to open a session for the virtual machine Kali-Linux-2020.1-vbox-i386.

VT-x is not available (VERR_VMX_NO_VMX).

Result Code:
NS_ERROR_FAILURE (0x80004005)
Component:
ConsoleWrap
Interface:
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

Invalid settings detected
System Acceleration Page
The hardware virtualization is enabled in the acceleration section of the system Page
Although it is not supported by the host system.
It should be disabled in order to start virtual system. "</quote>

[scottgus1]

On https://www.virtualbox.org/wiki/Linux_Downloads there is no download for Ubuntu 20 yet, so you're using the Ubuntu fork of Virtualbox, which we would't have the knowledge to support.

You would also at least have to zip and post both guest vbox.logs, then we might have more data to make a guess.

[BillG]

Nested virtualization (running a vm inside a vm) is a new feature and may not be reliable yet.

The error message is telling you that hardware virtualization is not available to the nested vm. That does not surprise me.

Whether you can change the setting in the vm and have the nested vm run without it depends on the version of VirtualBox you are using. In the latest versions, the old emulation software has been removed, so you cannot fall back. The vm guest must have access to VT-x or AMD-V.

[vbuseruservb]

My first Virtual Box on Ubuntu 20 is
virtualbox-6.1_6.1.6-137129~Ubuntu~eoan_amd64.deb
with whonix workstation installed
build 6.1.6_ubuntu r137129

The Second virtual Box installed on whonix workstation at the moment is
Version 6.1.4 r136177 (Qt5.6.1) running on it.

I previously had build 6.1.6_ubuntu r137129 installed as the second virtual box
but still same error.
I thought if I try an earlier version I may be able to rectify the error but no luck.
The behaviour is same with both versions.

[BillG]

You need to enable nested virtualization in the settings of the first vm which is hosting your nested vm so that it can expose it to its vm. See the manual Chapter 9.33 .

Nestedvm.PNG

[vbuseruservb]

I believe you have identified the issue.

The only problem is "Enable Nested VT-x/AMD-V "
is grayed out and I can't select it on my machine.
www<dot>virtualbox<dot>org<slash>manual<slash>ch09.html -> I can't do URI

There is chapter 9.3.1 & 9.3.2 then 9.4 hot plugging but not 9.3.3 or 9.33

[fth0]

The only problem is "Enable Nested VT-x/AMD-V "
is grayed out and I can't select it on my machine.

Then you'll not be able to use nested virtualization on this machine. The VBox.log file that you didn't post would show the details needed for an explanation.

And chapter 9.33 is the second but last chapter. Look closely.

[vbuseruservb]

Please find attached zip file of Logs.
1st VirtualBox log file Whonix-Workstation-VBox.log

[vbuseruservb]

Hi,
Looking through the documents as per your directions.

I ran the command
VBoxManage modifyvm Whonix-Workstation-XFCE --nested-hw-virt on

and I have gone past that error, it is now trying to install.

next I think I have to go back and re install the 64 bit version virtual machines & ISO.
With the previous error I didn't have the option only 32 bit.

The error is saying use the correct kernel for the CPU.

So thanks you.
This Issue closed.

[fth0]

00:00:01.017651 Nested hardware virtualization - VMX features
00:00:01.017651   Mnemonic - Description                                  = guest (host)
00:00:01.017651   VMX - Virtual-Machine Extensions                        = 0 (1)
00:00:01.017665   Ept - Extended Page Tables                              = 0 (1)
00:00:01.017668   UnrestrictedGuest - Unrestricted guest                  = 0 (1)
00:00:01.017671   VmcsShadowing - VMCS shadowing                          = 0 (0)

AFAIK, the VirtualBox Manager will prevent setting the Enable Nested VT-x/AMD-V checkbox, if any of those 4 CPU features is not available(*). This can be circumvented (in VirtualBox 6.1.6 at least) with the VBoxManage modifyvm <vm name> --nested-hw-virt on command, but then VirtualBox will still not be provide the EPT and UnrestrictedGuest features to the first level guest. In consequence, I'd expect the second level guest to be quite slow.

(*) Many newer (8th/9th gen) mobile Intel CPUs are missing the VMCS Shadowing feature. I've verified this on my own notebook and in several threads on the VirtualBox forums so far.

[BillG]

Why are you surprised? In the reply to your previous post on this same topic, you were told it would be slow!

Nested virtualisation is still in its early stages (especially on an Intel CPU). It certainly does not work very well for me on an I7-7700 .

[gyalish]

Cannot enable nested VT-x/AMD-V without nested-paging and unresricted guest execution!
(VERR_CPUM_INVALID_HWVIRT_CONFIG).


Result Code:
E_FAIL (0x80004005)
Component:
ConsoleWrap
Interface:
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

i have enable but it show this issue .what is the best solN for it ??

[gyalish]

Failed to open a session for the virtual machine GNS3 VM.

Cannot enable nested VT-x/AMD-V without nested-paging and unresricted guest execution!

(VERR_CPUM_INVALID_HWVIRT_CONFIG).

Result Code: E_FAIL (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

[fth0]

Please post a zipped VBox.log file from a VM run showing the error.