package lightdm 1.10.5-0ubuntu1.1 failed to install/upgrade: подпроцесс установлен сценарий post-removal возвратил код ошибки 1

[Archie]

after installing ubuntu-tweak and changing login screen background image

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.5-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.16.0-43.58~14.04.1-generic 3.16.7-ckt13
Uname: Linux 3.16.0-43-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
AptOrdering:
 ubuntu-desktop: Purge
 lightdm: Purge
Architecture: amd64
Date: Mon Jul 20 17:10:53 2015
ErrorMessage: подпроцесс установлен сценарий post-removal возвратил код ошибки 1
InstallationDate: Installed on 2015-07-18 (2 days ago)
InstallationMedia: It
SourcePackage: lightdm
Title: package lightdm 1.10.5-0ubuntu1.1 failed to install/upgrade: подпроцесс установлен сценарий post-removal возвратил код ошибки 1
UpgradeStatus: No upgrade log present (probably fresh install)