[Bug 1932027] Re: package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255

[Tomdkat]

After installing some Ubuntu updates, I noticed the EFI related info in
some dmesg output.  I'm not sure if it's related or not, so I'm posting
it.  The attached file was created by me, after reviewing dmesg output
after a fresh system boot.

** Attachment added: "EFI related information from dmesg output."
   https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1932027/+attachment/5530156/+files/kernel-firmware-crash.txt

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Title:
  package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 255

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  This issue has been reported previously and has been happening since
  the upgrade from Ubuntu 18.04 to 20.04.

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2
  ProcVersionSignature: Ubuntu 5.4.0-74.83-generic 5.4.114
  Uname: Linux 5.4.0-74-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  AptOrdering:
   libmagickcore-6.q16-6:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Tue Jun 15 06:02:06 2021
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
  InstallationDate: Installed on 2019-06-16 (729 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  Python3Details: /usr/bin/python3.8, Python 3.8.5, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.5
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255
  UpgradeStatus: Upgraded to focal on 2020-10-05 (252 days ago)

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