[Bug 1905584] Re: package grub-pc 2.04-1ubuntu35.1 failed to install/upgrade: installed grub-pc 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-pc 2.04-1ubuntu35.1 failed to install/upgrade: installed
  grub-pc package post-installation script subprocess returned error
  exit status 1

Status in grub2 package in Ubuntu:
  New

Bug description:
  While installing as an OEM PC

  ProblemType: Package
  DistroRelease: Ubuntu 20.10
  Package: grub-pc 2.04-1ubuntu35.1
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu50.2
  AptOrdering: NULL: ConfigurePending
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.455
  Date: Wed Nov 25 21:13:36 2020
  DuplicateSignature:
   package:grub-pc:2.04-1ubuntu35.1
   Setting up tzdata (2020d-1ubuntu1) ...
   /var/lib/dpkg/info/tzdata.postinst: 44: 3: Bad file descriptor
   dpkg: error processing package tzdata (--configure):
    installed tzdata package post-installation script subprocess returned error exit status 2
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 1
  LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/hostname.seed only-ubiquity oem-config/enable=true quiet splash ---
  Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.6-0ubuntu1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.20.5ubuntu2
   apt  2.1.10
  SourcePackage: grub2
  Title: package grub-pc 2.04-1ubuntu35.1 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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