virtualbox doesnt run VMs since the vboxdrv module is not loaded automatically

Ubuntu 15.04, uptodate
virtualbox install from the repo.

I cant start a VM and getting an error with the hint to run a command which doesnt work:
"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. ....."
That doesnt work at all since we have systemd since 15.04 and its not present in /etc/init.d/ anyway.

Turns out the issue is that vboxdrv module is not loaded.
"sudo modprobe vboxdrv" solves the issue.

to keep it working after reboot i needed to do:
sudo chmod 660 /dev/vboxdrv
sudo chgrp vboxusers /dev/vboxdrv

and add "vboxdrv" to the /etc/modules.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: virtualbox 4.3.26-dfsg-2ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
Uname: Linux 3.19.0-21-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jun 17 12:40:10 2015
InstallationDate: Installed on 2013-09-28 (626 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
SourcePackage: virtualbox
UpgradeStatus: Upgraded to vivid on 2015-02-16 (120 days ago)