If you installed the latest version of Oracle Virtualbox (4.3.12 or 4.3.14) for creating multiple Virtual Machines on Ubuntu 14.04 system and when trying to run the Virtualbox, if it shows the following error.
Kernel driver not installed (rc=-1908)
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
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.
It looks like there is some kernel driver required for Virtualbox to run properly.
So here are the steps to do the necessary.
Firstly install the kernel headers and build tools.
# sudo apt-get install build-essential module-assistant
# sudo m-a prepare
And now compile the VirtualBox Kernel driver by executing following command.
# sudo /etc/init.d/vboxdrv setup
Stopping VirtualBox kernel modules …done.
Recompiling VirtualBox kernel modules …done.
Starting VirtualBox kernel modules …done.
After successfully completing the compilation it’ll show output as above.
Now run Virtualbox again then it should run fine.