I get this message while trying to install Ubuntu 12.04 as a guest in VirutalBox 4.1.18, on an Ubuntu 10.04 host.

This kernel requires the following feature not present on the CPU: pae

Some host specs:

  • The host's kernel is: Linux 2.6.32-41-generic-pae GNU/Linux
  • lscpu (host): Architecture: i686, CPU op-mode(s): 32-bit, 64-bit
  • grep --color=always -i PAE /proc/cpuinfo   does show pae in its output.

The 12.04 iso used is: ubuntu-12.04.0-desktop-i386.iso

As a comparison/check, I downloaded and installed Linux Mint 13 Cinnamon to the same host on the exact same VM (I just changed the .iso image). It worked fine. Its iso is: linuxmint-13-cinnamon-dvd-32bit.iso

It seems (to me) that I have pae.. what is going on here?

Update: I had assumed that Linux Mint also required pae (being Ubuntu based), but I've just run;   grep --color=always -i PAE /proc/cpuinfo   in the Mint VM.   It showed no output.   So it seems the issue may lie with VirtualBox.   If that is the case, how can I get Virtualbox into pae mode?


On VirtualBox Manager, open your virtual machine configuration then select System on the left side and open the Processor tab. Be sure that Enable PAE/NX is checked.

enter image description here

For commandline

VBoxManage modifyvm <VM_name> --pae on

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.