Re: simple question....i hope, evo HTC
LOL, I accidently flipped the image on my laptop upside down. Can be fixed in windows properties although I don't know how I flipped it, I must have been some key combination.
Are you using a custom ROM or are you stock. Have you enabled and disabled auto screen rotation? Have you tried a battery pull and restarted the phone. Last resort would be doing a factory reload to reload the original software, but you would lose all your data, so save everything important before you do that.