[Bug 1789409] Re: 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

[Phillip Susi]

*** This bug is a duplicate of bug 1788727 ***
    https://bugs.launchpad.net/bugs/1788727

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1788727, so it is being marked as such. Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** 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
Foundations Bugs, which is subscribed to grub2 in 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

Status in grub2 package in Ubuntu:
  New

Bug description:
  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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1789409/+subscriptions