---愛的報報----鳳梨酥--

VirtualBox driver (vboxdrv) missing after Ubuntu 12.04 upgrade

After upgrading to 12.04 I got the following error when trying to start VirtualBox:

The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing

‘/etc/init.d/vboxdrv setup’

as root. If it is available in your distribution, you should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary.

The script mentioned did not exist because the vboxdrv was not compiled.
# sudo /etc/init.d/vboxdrv setup
sudo: /etc/init.d/vboxdrv: command not found

If you reinstall virtualbox-dkms it will recompile the driver for your kernel version, provided you have the correct kernel headers.
# sudo apt-get remove dkms virtualbox-dkms
# uname -a
Linux pc786-ubu 3.2.0-33-generic #52-Ubuntu SMP Thu Oct 18 16:29:15 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
# sudo apt-get install linux-headers-3.2.0-33
# sudo apt-get install dkms virtualbox-dkms