14.10: VirtualBox "No suitable module for running kernel found", Cannot Find Kernel Source

It seems like your upgrade from Ubuntu 14.04 to 14.10 broke something. You should have kernel version 3.16.0-30

Make sure that your /etc/apt/sources.list only contains entries with 'utopic' and not 'trusty'. Then make sure that following packages are installed, or install them if necessary:

apt-get install linux-generic linux-image-generic linux-headers-generic linux-signed-generic

After that you should be able to remove and re-install virtualbox and rebuild the kernel module.

For those who might have same problem:

My system is Linux Mint 17.1 (which uses Ubuntu 14.04 Trusty repos).

I've tried to install VirtualBox with:

sudo apt-get install virtualbox

And eccountered same error.

Solution:

Uninstall bad version of VirtualBox with:

sudo apt-get purge virtualbox

Then get installer from https://www.virtualbox.org/wiki/Linux_Downloads and install deb package. Is says same version is in your repositories... but that way it works.

I always found that "remove & reinstall" so windows-esque... I solved with sudo dpkg-reconfigure virtualbox-dkms (of course, if you didn't install it yet, you can use sudo apt install virtualbox-dkms)