Tested proposed kernel 4.4.0-22.38 for xenial, does not solve the virtualbox-bug. Virtualbox package is 5.0.18-dfsg-2build1, kernel module won't load with error message "modprobe: ERROR: could not insert 'vboxdrv': Required key not available".
Tested proposed kernel 4.4.0-22.38 for xenial, does not solve the virtualbox-bug. Virtualbox package is 5.0.18- dfsg-2build1, kernel module won't load with error message "modprobe: ERROR: could not insert 'vboxdrv': Required key not available".