[Bug 1840381] Re: package grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 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/1840381

Title:
  package grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 failed
  to install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  Tried to update from Ubuntu 12.04 to 16.04 using a download on a USB
  stick and ran into errors. Then tried to upgrade the partial
  installation of 16.04 to 18.04 and ran into further errors.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22
  ProcVersionSignature: Ubuntu 4.15.0-58.64~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-58-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.19
  Architecture: amd64
  Date: Thu Aug 15 23:18:18 2019
  DuplicateSignature:
   package:grub-efi-amd64-signed:1.66.22+2.02~beta2-36ubuntu3.22
   Setting up grub-efi-amd64-signed (1.66.22+2.02~beta2-36ubuntu3.22) ...
   grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target 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
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.6
   apt  1.2.32
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: Upgraded to xenial on 2019-08-15 (0 days ago)

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