lightdm fails to start on boot of ubuntu mate but starts when restarted

[Lyn Perrine]

boot March 6th daily ubuntu mate installation went fine restarted got to grub started up and did not load any further switched to tty and no gui or splash screen came up. I switched to tty 1 and was able to login.

lightdm:
  Installed: 1.13.1-0ubuntu2
  Candidate: 1.13.1-0ubuntu2
  Version table:
 *** 1.13.1-0ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
        100 /var/lib/dpkg/status
Description: Ubuntu Vivid Vervet (development branch)
Release: 15.04

to reproduce install ubuntu-mate using manaul partitioning using an ext4 / partition and reusing an xfs /home. I expected lightdm to come up and display a GUI and I could get it to start by restarting it.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: lightdm 1.13.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic x86_64
ApportVersion: 2.16.2-0ubuntu1
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Mar 6 09:45:52 2015
InstallationDate: Installed on 2015-03-06 (0 days ago)
InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Alpha amd64 (20150306)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1429222

[Launchpad Janitor (janitor)]

[Expired for lightdm (Ubuntu) because there has been no activity for 60 days.]