I put LocalAvatar in OVRPlayerController in unity. Sometimes it work well but sometimes my hands cannot grab objects by pressing triggers and I cannot use thumbsticks. I use Unity 5.6.6 and Oculus Utilities v1.27.0, OVRPlugin v1.14.1, SDK v1.29.0.
@imperativity Thanks for your answer! I actually followed exactly the same step as the documentation. I tested for these two days and it worked every time! The only thing I changed was I unchecked most of the Ovr Grabbable Scripts which I attached to objects, but I still could grab all the objects.