iPad home button not working?

Don't ask me how this works, but it does.

I know this seems......silly?!?  My home button doesn't/hasent worked in the past and I got it fixed.  Try this.  With your iPad in portrait view (long ways up and down), press and hold the home button.  While continuing to hold the home button, turn the iPad to landscape view (long ways left to right), then back to portrait view.  Make sure your screen rotates when you do this.  Now let go of the home button.  Hopefully, this is a fix to the "more common" issue in this case and resolves your problem.

Source: https://discussions.apple.com/message/19392715#19392715