[Bug 1725406] Re: package grub-efi-amd64-signed 1.85+2.02~beta3-4ubuntu7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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** Tags removed: need-duplicate-check

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Title:
  package grub-efi-amd64-signed 1.85+2.02~beta3-4ubuntu7 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  Received report after upgrade from 17.04 to 17.10.

  ProblemType: Package
  DistroRelease: Ubuntu 17.10
  Package: grub-efi-amd64-signed 1.85+2.02~beta3-4ubuntu7
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
  Date: Fri Oct 20 10:09:50 2017
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2016-04-28 (539 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
  RelatedPackageVersions:
   dpkg 1.18.24ubuntu1
   apt  1.5
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.85+2.02~beta3-4ubuntu7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: Upgraded to artful on 2017-10-20 (0 days ago)

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