[Bug 1800241] Re: package grub-efi-amd64-signed 1.93.8+2.02-2ubuntu8.7 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Amir]

*** This bug is a duplicate of bug 1753518 ***
    https://bugs.launchpad.net/bugs/1753518

** This bug has been marked a duplicate of bug 1753518
   package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 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 grub-efi-amd64-signed 1.93.8+2.02-2ubuntu8.7 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  Error message appeared after reboot.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93.8+2.02-2ubuntu8.7
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  Date: Fri Oct 26 00:13:56 2018
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  Python3Details: /usr/bin/python3.6, Python 3.6.6, 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  1.6.6
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93.8+2.02-2ubuntu8.7 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-03-27 (213 days ago)

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