[Bug 1778224] Re: package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: grub2-signed (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1778224

Title:
  package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed
  to install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  i want to install new ubuntu over pre installed

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18
  ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
  Uname: Linux 4.4.0-31-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Fri Jun 22 09:00:01 2018
  DuplicateSignature:
   package:grub-efi-amd64-signed:1.66.18+2.02~beta2-36ubuntu3.18
   Setting up grub-efi-amd64-signed (1.66.18+2.02~beta2-36ubuntu3.18) ...
   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 1.18.4ubuntu1.4
   apt  1.2.26
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 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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