VirtualBox: Spawning Session

After a recent kernel upgrade, I found my VirtualBox 2.0 stopped launching VMs, and would just sit there with a dialog saying "Spawning Session" and a progresss bar which never went past 0%.

A quick look on Ubuntuforums and I found others are having the same problem. Turns out the kernel module hasn't loaded. We can force a recompile with this command:

sudo /etc/init.d/vboxdrv setup

It then stops, recompiles, and starts the module:

* Stopping VirtualBox kernel module
* done.
* Recompiling VirtualBox kernel module
* done.
* Starting VirtualBox kernel module
* done.

And VirtualBox is working again!