Unfortunately, the PS4 2.0 software update came packing more than just SharePlay and a better-organized home screen. For a number of users it introduced some annoying bugs, like the inability to come back from rest mode without unplugging the system. Luckily, Sony has just released version 2.01 to specifically address those rest mode issues. There's no word on whether it will fix any of the other problems that have been reported, but this might be one of the most-anticipated stability updates so far.

http://www.engadget.com/2014/11/04/ps4-2.0-fix/