hello, i am using Ubuntu 14.04LTS and a week ago i installed Lubuntu desktop over unity in ubuntu 14.04 LTS.

after somedays of going good, lubuntu desktop auto logs off whenever i try to log in with my only one account.
This only happens to lubuntu desktop. When i login into 'Lubuntu netbook' there is no problem only problem is when i try to log in with 'Lubuntu' selection at startup login screen
I gets automatically log off but thanks to unity i can still access my account as there are no such problems for unity and i can log in or out whenever, whereever!

I like LXDE because i want lightweight things and LXDE and Xfce both are good.