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
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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
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