Yes, it was term.log, but since this all happened two months ago, the relevant log was already archived. I'm now attaching it with the correct name. Also I pasted the other outputs in the original post, but I'll repaste them here as well for clarity:
/boot/efi/EFI/ubuntu$ ls -l total 2592 -rwxr-xr-x 1 root root 126 May 18 21:35 grub.cfg -rwxr-xr-x 1 root root 119296 Jul 2 06:58 grubx64.efi -rwxr-xr-x 1 root root 1178240 May 18 21:35 MokManager.efi -rwxr-xr-x 1 root root 1355736 May 18 21:35 shimx64.efi 'efibootmgr -v' does not output anything. ** Attachment removed: "term.log.1.gz" https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1489987/+attachment/4453943/+files/term.log.1.gz ** Attachment added: "term.log" https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1489987/+attachment/4454010/+files/term.log -- 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