[Bug 1856412] Re: package grub-efi-amd64 2.04-1ubuntu12.1 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1

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** Tags removed: need-duplicate-check

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Title:
  package grub-efi-amd64 2.04-1ubuntu12.1 failed to install/upgrade:
  installed grub-efi-amd64 package post-installation script subprocess
  returned error exit status 1

Status in grub2 package in Ubuntu:
  New

Bug description:
  ...............................................

  ProblemType: Package
  DistroRelease: Ubuntu 19.10
  Package: grub-efi-amd64 2.04-1ubuntu12.1
  ProcVersionSignature: Ubuntu 5.0.0-37.40-generic 5.0.21
  Uname: Linux 5.0.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  Date: Sun Dec 15 00:01:32 2019
  ErrorMessage: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  InvalidGrubScript: /etc/grub.d/25_custom
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-37-generic root=UUID=99fbd049-7c8f-4c0b-ac81-61ffa3b84eec ro recovery nomodeset
  Python3Details: /usr/bin/python3.7, Python 3.7.5, python3-minimal, 3.7.5-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.17rc1, python-minimal, 2.7.17-1
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu2
   apt  1.9.4
  SourcePackage: grub2
  Title: package grub-efi-amd64 2.04-1ubuntu12.1 failed to install/upgrade: installed grub-efi-amd64 package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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