Stuck in text login

Hi! Somehow I did something to get me stuck in the text login instead of the graghical. I tried all of these commands that people told me to type in but nothing seems to work. I know that when I do startx it tells me that (EE) MGA(0): No display subsection in screen section “screen0” for depth/fbbpp8/8. And it also says screens found, but none have a usable configuration. Please help me!!!