[Bug 2102650] Re: package grub-pc 2.12-5ubuntu5.1 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 127

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** Tags removed: need-duplicate-check

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Title:
  package grub-pc 2.12-5ubuntu5.1 failed to install/upgrade: installed
  grub-pc package post-installation script subprocess returned error
  exit status 127

Status in grub2 package in Ubuntu:
  New

Bug description:
  N: Ignoring file 'ubuntu-esm-infra.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  N: Ignoring file 'google-chrome.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  N: Ignoring file 'ubuntu-esm-apps.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  Preconfiguring packages ...
  /var/cache/debconf/tmp.ci/grub-pc.config.44oJdm: 6: /etc/default/grub: --class: not found
  grub-pc failed to preconfigure, with exit status 127
  (Reading database ... 253411 files and directories currently installed.)
  Preparing to unpack .../grub-pc_2.12-5ubuntu5.1_amd64.deb ...
  Unpacking grub-pc (2.12-5ubuntu5.1) over (2.12-5ubuntu5.1) ...
  Setting up grub-pc (2.12-5ubuntu5.1) ...
  /var/lib/dpkg/info/grub-pc.config: 6: /etc/default/grub: --class: not found
  dpkg: error processing package grub-pc (--configure):
   installed grub-pc package post-installation script subprocess returned error exit status 127
  Processing triggers for man-db (2.12.1-3) ...
  Errors were encountered while processing:
   grub-pc
  N: Ignoring file 'ubuntu-esm-infra.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  N: Ignoring file 'google-chrome.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  N: Ignoring file 'ubuntu-esm-apps.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 24.10
  Package: grub-pc 2.12-5ubuntu5.1
  ProcVersionSignature: Ubuntu 6.11.0-13.14-generic 6.11.0
  Uname: Linux 6.11.0-13-generic x86_64
  ApportVersion: 2.30.0-0ubuntu4
  AptOrdering:
   grub-pc:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Fri Mar 14 10:26:52 2025
  DpkgHistoryLog:
   Start-Date: 2025-03-14  10:26:51
   Commandline: apt-get --reinstall install grub-pc
   Requested-By: jjgoolsk (1000)
   Reinstall: grub-pc:amd64 (2.12-5ubuntu5.1)
  DuplicateSignature:
   package:grub-pc:2.12-5ubuntu5.1
   Setting up grub-pc (2.12-5ubuntu5.1) ...
   /var/lib/dpkg/info/grub-pc.config: 6: /etc/default/grub: --class: not found
   dpkg: error processing package grub-pc (--configure):
    installed grub-pc package post-installation script subprocess returned error exit status 127
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 127
  EtcDefaultGrubD.kdump-tools.cfg: GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M"
  InstallationDate: Installed on 2023-12-06 (464 days ago)
  InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
  InvalidGrubScript: /etc/default/grub
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.11.0-13-generic root=UUID=fc8bd1bf-9c0c-4e99-88a2-c3ace4e4c3db ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7
  Python3Details: /usr/bin/python3.12, Python 3.12.7, python3-minimal, 3.12.6-0ubuntu1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.22.11ubuntu1
   apt  2.9.8
  SourcePackage: grub2
  Title: package grub-pc 2.12-5ubuntu5.1 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 127
  UpgradeStatus: Upgraded to oracular on 2024-10-15 (150 days ago)

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