[Bug 1878060] Re: package grub-efi-amd64 2.02-2ubuntu8.15 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1

[Mate Kukri]

*** This bug is a duplicate of bug 2069726 ***
    https://bugs.launchpad.net/bugs/2069726

** This bug has been marked a duplicate of bug 2069726
   outdated grub2 install failure catch-all

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Title:
  package grub-efi-amd64 2.02-2ubuntu8.15 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:
  Occcured when installing upgrades from Ubuntu 16.04 to 18.04.
  1. 'lsb_release -rd' showed version 18.04
  2. 'apt-cache policy pkgname' returns 'N: Unable to locate package pkgname'
  3. Expected grub to be installed
  4. Error message popup instead

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64 2.02-2ubuntu8.15
  Uname: Linux 4.20.17-042017-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  Date: Tue May 12 00:31:45 2020
  ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2019-06-21 (324 days ago)
  InstallationMedia: Ubuntu 16.04.6 LTS "Xenial Xerus" - Release amd64 (20190227)
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.20.17-042017-generic root=UUID=179aa94e-f69c-4165-9c45-bcd273911c02 ro quiet splash dis_ucode_ldr acpi=force vt.handoff=7
  Python3Details: /usr/bin/python3.6, Python 3.6.9, python3-minimal, 3.6.7-1~18.04
  PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2.3
   apt  1.6.12
  SourcePackage: grub2
  Title: package grub-efi-amd64 2.02-2ubuntu8.15 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2020-05-11 (0 days ago)

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