ubuntu-desktop not install normally

[Alex_ander]

When I did:
- Install ubuntu mini from mini.iso
- Install lubuntu-core
- Install lxdm
- Purge lightdm
- Install ubuntu-desktop

I get the next problems:
- lighdm don`t loading
- Unity session don`t loading and don`t work when I tried to pushup "Unity plugin" from the CCSM

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-desktop 1.347
ProcVersionSignature: Ubuntu 4.4.0-4.19-generic 4.4.1
Uname: Linux 4.4.0-4-generic x86_64
ApportVersion: 2.19.4-0ubuntu2
Architecture: amd64
CurrentDesktop: LXDE
Date: Sun Feb 14 15:23:32 2016
SourcePackage: ubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)