I didn't get a chance to try with secure boot disabled because the upgrade ran the recovery. I will disable secure boot and try again.
Earlier message in full from earlier in installation: Your system has UEFI Secure Boot enabled in firmware, and the following kernels present on your system are unsigned: 4.4.0-133-generic These kernels cannot be verified under Secure Boot. To ensure your system remains bootable, GRUB will not be upgraded on your disk until these kernels are removed or replaced with signed kernels. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1787216 Title: package grub-efi-amd64 2.02-2ubuntu8.3 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1787216/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
