package gdm3 3.36.3-0ubuntu0.20.04.2 failed to install/upgrade: installed gdm3 package post-installation script subprocess returned error exit status 10

[Vahid Safavi]

Hi - Such errors started to happen during software updates after I had accidentally deleted my boot partition and restored it using the Ubuntu installation CD. So, the issue is unlikely a bug.

Right now, the system is up and running the applications I use correctly. Nevertheless, I believe some of the functionality of OS has been compromised. For example, there are missing icons on "Show Applications".

Thanks
Vahid

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: gdm3 3.36.3-0ubuntu0.20.04.2
ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
Uname: Linux 5.4.0-54-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.12
Architecture: amd64
CasperMD5CheckResult: skip
Date: Mon Dec 28 11:16:04 2020
DpkgHistoryLog:
 Start-Date: 2020-12-28 11:15:56
 Commandline: aptdaemon role='role-commit-packages' sender=':1.108'
 Upgrade: libldap-2.4-2:amd64 (2.4.49+dfsg-2ubuntu1.4, 2.4.49+dfsg-2ubuntu1.5), libldap-common:amd64 (2.4.49+dfsg-2ubuntu1.4, 2.4.49+dfsg-2ubuntu1.5)
 Remove: linux-image-5.4.0-51-generic:amd64 (5.4.0-51.56), linux-headers-5.4.0-51-generic:amd64 (5.4.0-51.56), linux-modules-extra-5.4.0-51-generic:amd64 (5.4.0-51.56), linux-modules-5.4.0-51-generic:amd64 (5.4.0-51.56), linux-headers-5.4.0-51:amd64 (5.4.0-51.56)
DuplicateSignature:
 package:gdm3:3.36.3-0ubuntu0.20.04.2
 Setting up grub-pc (2.04-1ubuntu26.6) ...
 dpkg: error processing package grub-pc (--configure):
  installed grub-pc package post-installation script subprocess returned error exit status 10
ErrorMessage: installed gdm3 package post-installation script subprocess returned error exit status 10
InstallationDate: Installed on 2019-09-22 (463 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
Python3Details: /usr/bin/python3.8, Python 3.8.5, unpackaged
PythonDetails: /usr/bin/python2.7, Python 2.7.18, unpackaged
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.2ubuntu0.1
SourcePackage: gdm3
Title: package gdm3 3.36.3-0ubuntu0.20.04.2 failed to install/upgrade: installed gdm3 package post-installation script subprocess returned error exit status 10
UpgradeStatus: Upgraded to focal on 2020-09-29 (90 days ago)