package linux-image-4.15.0-43-generic 4.15.0-43.46~16.04.1 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1

[Ilija Maravic]

Turned on the computer, and not long after, I got this bug.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: linux-image-4.15.0-43-generic 4.15.0-43.46~16.04.1
ProcVersionSignature: Ubuntu 4.15.0-42.45~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Thu Dec 20 17:04:14 2018
ErrorMessage: run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
InstallationDate: Installed on 2018-12-12 (7 days ago)
InstallationMedia: Ubuntu 16.04.5 LTS "Xenial Xerus" - Release amd64 (20180731)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.5
 apt 1.2.29
SourcePackage: grub
Title: package linux-image-4.15.0-43-generic 4.15.0-43.46~16.04.1 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Steve Langasek (vorlon)]

This bug report shows that you have the grub package installed, which is obsolete (removed in Ubuntu 18.04 and later) and not the version of grub that is installed by the Ubuntu installer. You have installed the wrong version of grub and have not configured it, resulting in errors at kernel install time.

You should remove the grub package and install grub-pc instead.