[Bug 1727465] Re: package grub-efi-amd64-signed (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Apport retracing service]

** Tags removed: need-duplicate-check

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https://bugs.launchpad.net/bugs/1727465

Title:
  package grub-efi-amd64-signed (not installed) failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  Not able to dule boot my windows 7.
  http://past.ubuntu.com/25811665/
  http://past.ubuntu.com/25811463/
  http://past.ubuntu.com/25802632/

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed (not installed)
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  AptOrdering:
   grub-efi-amd64-signed: Configure
   shim-signed: Configure
   NULL: ConfigurePending
  Architecture: amd64
  Date: Tue Oct 24 23:49:35 2017
  Df:
   Filesystem     1K-blocks    Used Available Use% Mounted on
   /dev/sda6       50847092 4024232  44216928   9% /
   udev             1929140       0   1929140   0% /dev
   tmpfs             388948    6364    382584   2% /run
  DpkgTerminalLog:
   Setting up grub-efi-amd64-signed (1.66.7+2.02~beta2-36ubuntu3.7) ...
   Installing for x86_64-efi platform.
   grub-install: error: cannot find EFI directory.
   dpkg: error processing package grub-efi-amd64-signed (--configure):
    subprocess installed post-installation script returned error exit status 1
  DuplicateSignature:
   package:grub-efi-amd64-signed:(not installed)
   Installing for x86_64-efi platform.
   grub-install: error: cannot find EFI 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
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.19
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed (not installed) 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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