iPad doesn't rotate anymore My iPad won't rotate the screen anymore when I turn it. It just happend (like all problems of course) without any cause. 

I've done everything I can think of. 


Double tap on the Home button, swipe left and toggle the switch
Toggle the switch on the left side of the iPad with 'rotation lock' set to on
Reboot the iPad
Restore the iPad


I'm out of options... Anyone with more options? Or is it hardware to blame?
Since you've restored the iPad I would say that you've got some issue with the Hardware. If possible, Take it to an Apple Store for a Hardware test. 

Using an app which requires the use of the Accelerometer may test it too. 

EDITED: Its not the Gyroscope what tells the position of the device but the Accelerometer.