When i start the pc it boots fine but then it just shows gray background and nothing else if i move the mouse it shows the cursor on the gray screen also i am able to login into it by typing "Enter password Enter" although i am not able to see login happening on screen it does login and redirects to desktop and after that if i take screenshot it looks like this as you can see in the screen shot its two displays but actually there is only one display attached. if i move the cursor to the right edge it goes outside the monitor,seems like it is going inside "buit in display" if i disable the default display it seems working fine but every time i restart i have to disable it and the login problem is insane any one other then me can't figure out how to login to my pc.
I have the same problem on Ubuntu and Ubuntu Gnome 14.04 LTS I have LG 22M35 screen which is big 22 inch screen.