*** This bug is a duplicate of bug 1788727 *** https://bugs.launchpad.net/bugs/1788727
That's precisely why the upgrade crashed: to prevent you from having an unbootable system. E: Your kernels are unsigned. This system will fail to boot in a secure boot environment. It even shows a big scary dialog on the desktop explaining all that. ** This bug has been marked a duplicate of bug 1788727 upgrade crashing due to unsigned kernels -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788368 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/1788368/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs