gdm appears to have cycle problem/only works after using sudo service gdm restart in terminal

[ventrical]

opening screen will come on , then blackjout and then GDM will come up. After log in a metro screen will drop down. After using mouse to slide metro screen up it will present authorization error gdm screen. You have to Ctrl+Alt+F1 to terminal , log ing and restart with

sudo service gdm restart

and then you can log in normally.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: gdm 3.14.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5
Uname: Linux 3.18.0-13-generic x86_64
ApportVersion: 2.16.1-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Mon Feb 23 11:50:01 2015
InstallationDate: Installed on 2014-11-11 (103 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141110)
SourcePackage: gdm
UpgradeStatus: No upgrade log present (probably fresh install)