These lines look like the important ones from the logs: /boot/vmlinuz-4.15.0-1024-oem.efi.signed is signed, but using an unknown key: Subject: CN = PPA canonical-kernel-team ppa E: Your kernels are not signed with a key known to your firmware. This system will fail to boot in a Secure Boot environment. dpkg: error processing package grub-efi-amd64 (--configure): installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
Thanks ** Also affects: linux-signed-oem (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845861 Title: package grub-efi-amd64 2.02-2ubuntu8.13 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/1845861/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs