[Bug 1815156] Re: Package fails to configure on upgrade

[cement_head]

*** This bug is a duplicate of bug 1787692 ***
    https://bugs.launchpad.net/bugs/1787692

** This bug has been marked a duplicate of bug 1787692
   package grub-efi-amd64-signed 1.93.4+2.02-2ubuntu8.3 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

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Title:
  Package fails to configure on upgrade

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  $ sudo apt upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  1 not fully installed or removed.
  After this operation, 0 B of additional disk space will be used.
  Do you want to continue? [Y/n] y
  Setting up grub-efi-amd64-signed (1.93.12+2.02-2ubuntu8.11) ...
  /var/lib/dpkg/info/grub-efi-amd64-signed.postinst: 22: /var/lib/dpkg/info/grub-efi-amd64-signed.postinst: /usr/share/grub/grub-check-signatures: Permission denied
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 126
  Errors were encountered while processing:
   grub-efi-amd64-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93.12+2.02-2ubuntu8.11
  ProcVersionSignature: Ubuntu 4.18.0-14.15~18.04.1-generic 4.18.20
  Uname: Linux 4.18.0-14-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  CurrentDesktop: Unity:Unity7:ubuntu
  Date: Thu Feb  7 21:25:19 2019
  InstallationDate: Installed on 2019-01-15 (23 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  SourcePackage: grub2-signed
  UpgradeStatus: No upgrade log present (probably fresh install)

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