package lightdm 1.10.5-0ubuntu1.1 failed to install/upgrade: el subproceso instalado el script post-removal devolvió el código de salida de error 1

[Juan Pablo Sarmiento]

I can't access to desktop by lightdm after upgrade to 14.04.
I can access by gdm.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.5-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
Uname: Linux 3.13.0-61-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.11
AptOrdering:
 ubuntu-desktop: Purge
 lightdm: Purge
Architecture: amd64
Date: Wed Aug 19 11:29:04 2015
DuplicateSignature: package:lightdm:1.10.5-0ubuntu1.1:el subproceso instalado el script post-removal devolvió el código de salida de error 1
ErrorMessage: el subproceso instalado el script post-removal devolvió el código de salida de error 1
InstallationDate: Installed on 2011-06-25 (1515 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: lightdm
Title: package lightdm 1.10.5-0ubuntu1.1 failed to install/upgrade: el subproceso instalado el script post-removal devolvió el código de salida de error 1
UpgradeStatus: Upgraded to trusty on 2015-08-14 (4 days ago)