[Bug 1882369] Re: package grub-pc 2.04-1ubuntu12.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1

[robert Newton]

i upgraded from disco to focal by changing that word in /etc/apt/sources
;-)

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Title:
  package grub-pc 2.04-1ubuntu12.2 failed to install/upgrade: installed
  grub-pc package post-installation script subprocess returned error
  exit status 1

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  This happened during upgrade from 18.04 to 20.04.

  ProblemType: Package
  DistroRelease: Ubuntu 19.10
  Package: grub-pc 2.04-1ubuntu12.2
  ProcVersionSignature: Ubuntu 4.15.0-101.102-generic 4.15.18
  Uname: Linux 4.15.0-101-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8.9
  Architecture: amd64
  Date: Sat Jun  6 17:04:56 2020
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2012-03-07 (3013 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-101-generic root=UUID=34bcf296-c31f-410e-bad6-d299a2b74413 ro acpi_enforce_resources=lax quiet nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
  Python3Details: /usr/bin/python3.7, Python 3.7.5, python3-minimal, 3.7.5-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.17-1
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu2
   apt  1.9.4ubuntu0.1
  SourcePackage: grub2
  Title: package grub-pc 2.04-1ubuntu12.2 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to eoan on 2020-06-06 (0 days ago)

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