[Bug 1975388] Re: upgrade from 18.04 to 20.04 while on rollbacked kernel 4.15-0-177 - package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Julian Andres Klode]

Thank your for your bug report. This seems to be the result of local
misconfiguration, installing an unsigned kernel, and the script does
exactly what it was supposed to do.

If you need help with your system, consider using askubuntu, ubuntu-
users mailing list, the #ubuntu IRC channel on libera, or other user
support channels.

** Changed in: grub2-signed (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1975388

Title:
  upgrade from 18.04 to 20.04 while on rollbacked kernel 4.15-0-177 -
  package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Invalid

Bug description:
  Dell XPS 15 9570. Dual boot with Windows 10. Linux was on 18.04 when
  attempting to upgrade to 20.04. Had previously installed kernel
  4.15-0-177 which was rolled back to working kernel 4.15-0-175 due to
  issues already reported in Bug #1973482. Due to rollback, there was an
  unsigned image of kernel 4.15-0-177 in the machine, which caused the
  upgrade 20.04 to fail with following error. Ubuntu upgrade attempted
  while logged into kernel 4.15-0-175.

  package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 1

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2
  ProcVersionSignature: Ubuntu 5.4.0-110.124-generic 5.4.181
  Uname: Linux 5.4.0-110-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Sat May 21 12:24:34 2022
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2018-09-23 (1336 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.8
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.167.2+2.04-1ubuntu44.2 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to focal on 2022-05-21 (0 days ago)

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