This sounds as if there is something in your user directory which has been messed up.
Can you please chown your home directory recursively, to make sure you are the owner of all the files and directories, and let us know if it makes a difference. Assuming your username is "mike", this is the command I suggest that you run: sudo chown -R mike:mike /home/mike ** Changed in: lightdm (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1366209 Title: Returned to the greeter screen when logging in. Status in lightdm package in Ubuntu: Incomplete Bug description: If I log in as Guest or root, I can get into the account. However, if I use my normal user account, I just get returned to the login screen. If I use gdm as my desktop manager, I can get to my user account. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6 Uname: Linux 3.13.0-35-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.3 Architecture: amd64 Date: Fri Sep 5 17:49:46 2014 InstallationDate: Installed on 2014-08-19 (16 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) ProcEnviron: TERM=linux PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1366209/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp