package lightdm 1.30.0-0ubuntu3.1 failed to install/upgrade: installed lightdm package pre-removal script subprocess returned error exit status 10

[neil cawse]

I also had a login loop. nothing unusual with my install - just upgrading packages. Nothing custom.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: lightdm 1.30.0-0ubuntu3.1
ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
Uname: Linux 5.4.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.3
AptOrdering:
 slick-greeter:amd64: Remove
 lightdm:amd64: Remove
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Jun 4 23:43:52 2020
ErrorMessage: installed lightdm package pre-removal script subprocess returned error exit status 10
InstallationDate: Installed on 2020-05-18 (22 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18rc1, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.3
SourcePackage: lightdm
Title: package lightdm 1.30.0-0ubuntu3.1 failed to install/upgrade: installed lightdm package pre-removal script subprocess returned error exit status 10
UpgradeStatus: No upgrade log present (probably fresh install)