[Bug 1783562] Re: package grub-pc 2.02-2ubuntu8.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 10

[nurbawono]

it's also buggy in Ubuntu Ubuntu 16.04.5 LTS. I solve with remove or
modifying name of grub-pc.postinst to grub-pc.postinst.buggy. But
sometimes if you update your ubuntu, the grub-pc.postinst is back to
/var/lib/dpkg/info, and you're getting same error.

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Title:
  package grub-pc 2.02-2ubuntu8.2 failed to install/upgrade: installed
  grub-pc package post-installation script subprocess returned error
  exit status 10

Status in grub2 package in Ubuntu:
  Triaged

Bug description:
  This error come up every time I start my system.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-pc 2.02-2ubuntu8.2
  ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
  Uname: Linux 4.15.0-29-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Tue Jul 24 20:46:47 2018
  DuplicateSignature:
   package:grub-pc:2.02-2ubuntu8.2
   Setting up unattended-upgrades (1.1ubuntu1.18.04.5) ...
   dpkg: error processing package unattended-upgrades (--configure):
    installed unattended-upgrades package post-installation script subprocess returned error exit status 10
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 10
  InstallationDate: Installed on 2018-03-14 (132 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-29-generic root=UUID=2d103f0a-4c1b-4b58-9ce0-f4b78f65a235 ro quiet splash
  Python3Details: /usr/bin/python3.6, Python 3.6.5, unpackaged
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, unpackaged
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.3
  SourcePackage: grub2
  Title: package grub-pc 2.02-2ubuntu8.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 10
  UpgradeStatus: No upgrade log present (probably fresh install)

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