Problem

VirtualBox does not want to start in Ubuntu. Error messages are:

VirtualBox can't operate in VMX root mode.
Please disable the KVM kernel extension,
recompile your kernel and reboot.

Analysis

.

Solution

First setup vbox:

# sudo /etc/init.d/vboxdrv.dpkg-bak setup

The suggested:

# sudo /etc/init.d/vboxdrv setup

from [2] did not work for me.

Uninstall module:

# modprobe -r kvm_intel

Resources

  1. https://bugs.launchpad.net/ubuntu/+source/virtualbox-ose/+bug/292588
  2. http://ubuntuforums.org/showthread.php?t=1163811&page=2
VirtualBox could not start in Ubuntu

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