You didn't remove all the 177 packages, the headers package or so pulls
in a kernel and then apt switches to the unsigned one.
I'm going to reassign this to Linux, as we should ensure that doesn't
happen by not allowing unsigned to satisfy those dependencies.
** Package changed: grub2-signed (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Invalid => New
** Summary changed:
- 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
+ Removing signed kernel installs unsigned one due to dependencies
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1975388
Title:
Removing signed kernel installs unsigned one due to dependencies
Status in linux package in Ubuntu:
Confirmed
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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