Today i found a few problems trying to uninstall virtualbox-ose package for Ubuntu. The following happened:
Desinstalando virtualbox-ose …
* Stopping VirtualBox kernel modules * Cannot unload module vboxdrv
[fail]
invoke-rc.d: initscript virtualbox-ose, action “stop” failed.
dpkg: error al procesar virtualbox-ose (–remove):
To solve this issue, just edit the file /etc/default/virtualbox-ose as root and modify the line about kernel module loading and leave it at 0.