Accelerometer and compass

So my accelerometer and compass seem to have stopped working. I was using the app Check my Android from the Play Store and the only sensor to work properly was the GPS (well, and the touch screen sensors). The screen won't auto rotate (yes I do have auto rotate enabled) on the home screen. If I use an app the requires landscape mode (such Civilization Revolution 2) it will rotate. But then when I exit the app, my screen is stuck on landscape. I can't get it back to portrait unless I reboot. Are they the same sensor(or in the same package), since neither one is working for me?

So my question is, is this something that can be fixed? Or am I now stuck with it as long as I keep the tablet?

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