On Ubunutu 12.04 LTS, whenever I reset the GUI (ctl + alt + f7 or when I try to come back from suspend) my desktop appears "off" of my screen. Upon GUI reset, almost my entire laptop screen is black, with the exception of a vertical bar with a very small width on the left side of my display. This vertical bar appears to be the rightmost portion of my desktop, because I can move my mouse there and select the rightmost menu option from my upper menu bar. It is as if someone took my desktop and shifted it slightly less than one screen's width to the left.
Has anyone experienced something similar or know something I could try? I recently attached my computer to an external monitor which I am no longer using, and I have never had this issue prior to that event.