[Bug 1871963] Re: dpkg fails to install grub-efi-amd64 signed and shim-signed

[Bastian]

Had the same issue as philipp-classen, upgrade from 19.10 to 20.04 and
install failed:

grub-efi-amd64-signed (1.142+2.04-1ubuntu26) wird eingerichtet ...
dpkg: Fehler beim Bearbeiten des Paketes grub-efi-amd64-signed (--configure):
 »installiertes grub-efi-amd64-signed-Skript des Paketes post-installation«-Unterprozess gab den Fehlerwert 10 zurück
Fehler traten auf beim Bearbeiten von:
 grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)


Also solved it following the instructions on https://stackoverflow.com/a/53284186/783510

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https://bugs.launchpad.net/bugs/1871963

Title:
  dpkg fails to install grub-efi-amd64 signed and shim-signed

Status in dpkg package in Ubuntu:
  Invalid
Status in grub2-signed package in Ubuntu:
  Fix Released

Bug description:
  See above

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: dpkg 1.19.7ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Thu Apr  9 18:41:33 2020
  InstallationDate: Installed on 2020-04-09 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: dpkg
  UpgradeStatus: No upgrade log present (probably fresh install)

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