Ok the problem was the vboxdrv. While virtualbox was removed, the vboxdrv was supplied by the virtualbox-dkms package (which was not removed).
Therefore removing manually virtualbox (again) and virtualbox-dkms (explicitly) removes everything. Then reinstalling virtualbox solved the problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1692200 Title: do-release-upgrade from 14.04 failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1692200/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
