package cgroupfs-mount 1.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Todor Todorov]

This happened when I tried to start an Win 8.1 Virtual machine in VirtualBox.

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: cgroupfs-mount 1.2
ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
Uname: Linux 4.2.0-22-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
Date: Wed Dec 23 08:09:23 2015
Dependencies: lsb-base 4.1+Debian11ubuntu8
DuplicateSignature: package:cgroupfs-mount:1.2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-11-18 (36 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5.1
 apt 1.0.10.2ubuntu1
SourcePackage: cgroupfs-mount
Title: package cgroupfs-mount 1.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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