[Q] Screen Won't Rotate

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http://forum.xda-developers.com – i've had AOKP build 4 flashed on my Nexus 7 since it was released on Sept.30. all of a sudden yesterday, i noticed that nothing would allow me to change the screen orientation. i checked and double checked, i have that setting enabled. for example, if i'm in portrait mode on the home screen, open up Chrome, i can not change the orientation to landscape. but, if i launch a game, where it forces the orientation to landscape, i am now stuck in landscape mode. if i open up Chrome, i can't change it to portrait. i've tried clearing data and cache of Nova Launcher. tried to lock down ori (HowTos)