Ok. Installing grub-efi-amd64-signed was expected to fix the SecureBoot bootability, so this was the problem. The logs provide no explanation of why this package was missing from your system, however, so there's nothing more we can do from this side to track that down. If you can find some explanation for this in your logs, feel free to reopen the bug.
** Changed in: shim (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1489987 Title: Secure Boot failed on Ubuntu 14.04 on Dell E7440 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1489987/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs