I am struggling with the same issue. This page gives some information on what I have been trying. http://gorka.eguileor.com/vbox-vmware-in- secureboot-linux/. I have successfully done mokutils --import but that key does not appear in the keyctl system_keyring list. In my case modinfo does not show the signature information as shown in that page . In order to verify the driver was even touched, you can grep for "~Module signature appended~" after signing.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574300 Title: Could not load 'vboxdrv' after upgrade to Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1574300/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
