Comment 9 for bug 1576768

no, the problem is in permissions.

crw-rw-rw- 1 root root 10, 55 mag 2 15:59 /dev/vboxdrvu

this is what it should be.

please remove the official virtualbox-5.0 --purge
and then
sudo chmod 666 /dev/vboxdrvu

and let me know if it works.