After running the oem-config wizard the file /etc/sddm.conf is not updated.
Causing sddm to fail after a reboot since it tries to autologin as the user oem, but that user doesn't exist.
Removing the /etc/sddm.conf file and restarting sddm fixes the problem.
DistroRelease: Ubuntu 15.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
Date: Wed Apr 22 14:20:56 2015
InstallationDate: Installed on 2015-04-22 (0 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150421.1)
UpgradeStatus: No upgrade log present (probably fresh install)