Public bug reported: Upgrading from 16.04 to 18.04
Unsigned kernel: Cannot upgrade Secure Boot enforcement policy due to unsigned kernel: Your system has UEFI Secure Boot enabled in firmware, and the following kernels present on your system are unsigned: 4.4.0-134-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. ProblemType: Package DistroRelease: Ubuntu 18.04 Package: grub-efi-amd64 2.02-2ubuntu8.3 ProcVersionSignature: Ubuntu 4.4.0-134.160-generic 4.4.140 Uname: Linux 4.4.0-134-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 Date: Tue Aug 28 14:19:54 2018 ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1 InstallationDate: Installed on 2014-11-08 (1388 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) InvalidGrubScript: /etc/grub.d/25_custom ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-134-generic.efi.signed root=UUID=9913b1ab-e27b-4aa2-a73c-8209f517108f ro quiet splash vt.handoff=7 Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1 PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1 RelatedPackageVersions: dpkg 1.19.0.5ubuntu2 apt 1.6.3ubuntu0.1 SourcePackage: grub2 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 UpgradeStatus: Upgraded to bionic on 2018-08-28 (0 days ago) ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1789409 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/1789409/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs