[Bug 1672236] Re: package grub-efi-amd64-signed 1.66.8+2.02~beta2-36ubuntu3.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Alberto Salvia Novella]

** Changed in: grub2-signed (Ubuntu)
   Importance: Undecided => High

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Title:
  package grub-efi-amd64-signed 1.66.8+2.02~beta2-36ubuntu3.8 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  On startup a system error was thrown, no idea what caused it.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed 1.66.8+2.02~beta2-36ubuntu3.8
  ProcVersionSignature: Ubuntu 4.8.0-41.44~16.04.1-generic 4.8.17
  Uname: Linux 4.8.0-41-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Sun Mar 12 18:31:57 2017
  DuplicateSignature:
   package:grub-efi-amd64-signed:1.66.8+2.02~beta2-36ubuntu3.8
   Installing for x86_64-efi platform.
   grub-install: error: cannot open `/boot/efi/EFI/ubuntu/shimx64.efi': No such file or directory.
   dpkg: error processing package grub-efi-amd64-signed (--configure):
    subprocess installed post-installation script returned error exit status 1
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2017-02-19 (21 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.19
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.66.8+2.02~beta2-36ubuntu3.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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