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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)
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-package focal need-duplicate-check
--
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
https://bugs.launchpad.net/bugs/1975388
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