package gdm 3.16.2-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Pingo Mutombo]

At startup

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: gdm 3.16.2-0ubuntu2
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic i686
ApportVersion: 2.19.1-0ubuntu4
Architecture: i386
Date: Sun Nov 1 09:11:15 2015
DuplicateSignature: package:gdm:3.16.2-0ubuntu2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: gdm
Title: package gdm 3.16.2-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to wily on 2015-10-28 (3 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.