lost and found ( for me ? )

Use KVM and VIrtualbox on the same machine ( Ubuntu 14.04 )

Here is how to use KVM and Virtualbox on Ubuntu 14.04


# kvm --version
QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.21), Copyright (c) 2003-2008 Fabrice Bellard

# dpkg -l | grep virtualbox
ii  unity-scope-virtualbox                                0.1+13.10.20130723-0ubuntu1                         all          VirtualBox scope for Unity
ii  virtualbox-5.0                                        5.0.12-104815~Ubuntu~trusty                         amd64        Oracle VM VirtualBox

You can not use Virtualbox and KVM simultaneously due to conflicts of kernel modules.

- switch to virtualbox from KVM

remove kernel modules of KVM.

root@ubuntu:~# modprobe -r kvm
root@ubuntu:~# modprobe -r kvm_amd

load vbox kernel modules.

root@ubuntu:~# /etc/init.d/vboxdrv start
Starting VirtualBox kernel modules ...done.

root@ubuntu:~# lsmod | grep vbox
vboxpci                24576  0
vboxnetadp             28672  0
vboxnetflt             28672  0
vboxdrv               450560  3 vboxnetadp,vboxnetflt,vboxpci

$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'centos60'...
Progress: 60%

$ vagrant ssh

$ vagrant ssh
Last login: Wed Nov 16 16:28:21 2011 from
[vagrant@localhost ~]$ exit
Connection to closed.

hattori@ubuntu:~/Vagrant_works/Works1$ vagrant halt
==> default: Attempting graceful shutdown of VM...

- switch to KVM from virtualbox

remove vbox kernel modules

$ sudo /etc/init.d/vboxdrv stop
Stopping VirtualBox kernel modules ...done.

$ sudo lsmod | grep vbox

load kvm kernel modules

$ sudo modprobe kvm_amd

$ sudo lsmod | grep kvm
kvm_amd                61440  0

kvm                   479232  1 kvm_amd

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