Virtualbox enable nested vtx/amd-v greyed out

Question

On my Ubuntu 18.04, I\'ve installed VirtualBox 6.0 in order to have nested virtualization. Virtualization is

Answer 1

So far it only works with AMD CPUs (forget about the confusing option title).

Initially this is for AMD CPUs only.

All Intel CPU posts will be deleted/split.

https://forums.virtualbox.org/viewtopic.php?f=1&t=90831

https://forums.virtualbox.org/viewtopic.php?f=7&t=90874

Answer 2

On VirtualBox 6.1.2 that worked (intel i7 2630QM)

(VBoxManage modifyvm lubuntu18 --nested-hw-virt on)

Answer 3

From the directory where VirtualBox is executed, I run a similar command that works (note the placement of the quotes!

VBoxManage modifyvm "path\to\ubuntu 18.04.3.vbox" --nested-hw-virt on

Hope this helps. BD

Answer 4

Execute this:

$ VBoxManage modifyvm vm-name --nested-hw-virt on

Answer 5

It's alive on VirtualBox 6.1.2 r135662 (Qt5.6.2) and Intel Core i3-8100!

CMD's output from image as text:

C:\WINDOWS\system32>ssh myuser@192.168.56.111
myuser@192.168.56.111's password:
Last login: Mon Feb 17 10:11:06 2020 from 192.168.56.1

myuser@nestedvt ~ $ su
Пароль:

root@nestedvt /home/myuser # egrep "svm|vmx" /proc/cpuinfo
root@nestedvt /home/myuser #

root@nestedvt /home/myuser # poweroff
Connection to 192.168.56.111 closed by remote host.
Connection to 192.168.56.111 closed.

C:\WINDOWS\system32>cd "C:\Program Files\Oracle\VirtualBox"
C:\Program Files\Oracle\VirtualBox>VBoxManage modifyvm CentOS7_nestedVT --nested-hw-virt on

C:\Program Files\Oracle\VirtualBox>VBoxManage startvm CentOS7_nestedVT
Waiting for VM "CentOS7_nestedVT" to power on...
VM "CentOS7_nestedVT" has been successfully started.

C:\Program Files\Oracle\VirtualBox>ssh myuser@192.168.56.111
myuser@192.168.56.111's password:
Last login: Mon Feb 17 10:12:08 2020 from 192.168.56.1

myuser@nestedvt ~ $ su
Пароль:

root@nestedvt /home/myuser # egrep "svm|vmx" /proc/cpuinfo
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc eagerfpu pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single tpr_shadow flexpriority fsgsbase avx2 invpcid rdseed clflushopt md_clear flush_l1d
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc eagerfpu pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single tpr_shadow flexpriority fsgsbase avx2 invpcid rdseed clflushopt md_clear flush_l1d

root@nestedvt /home/myuser # exit
exit
myuser@nestedvt ~ $ exit
logout
Connection to 192.168.56.111 closed.

C:\Program Files\Oracle\VirtualBox>wmic cpu get name
Name
Intel(R) Core(TM) i3-8100 CPU @ 3.60GHz

C:\Program Files\Oracle\VirtualBox>wmic os get caption
Caption
Microsoft Windows 10 Pro

Answer 6

For Windows

In Windows, go to VirtualBox installation folders -> type cmd on the bar (it will pop up cmd in that folder) -> type VBoxManage modifyvm YourVirtualBoxName --nested-hw-virt on -> enter.

Now it should been ticked.