[Bug 1798234] Re: package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Sebastien Bacher]

*** This bug is a duplicate of bug 1800106 ***
    https://bugs.launchpad.net/bugs/1800106

** This bug has been marked a duplicate of bug 1800106
   package grub-efi-amd64-signed (not installed) failed to install/upgrade: 'cannot find EFI directory'

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Title:
  package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 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:
  I'm very sorry. I am not an advanced enough user to understand what
  this means or how to fix it. If anyone can point me in the right
  direction I would very much appreciate it.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6
  ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
  Uname: Linux 4.15.0-34-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  Date: Tue Oct 16 19:06:57 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  1.6.3ubuntu0.1
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93.7+2.02-2ubuntu8.6 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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