Sony will roll out PS4 system software update 2.01 today, promising to fix an issue relating to some PS4 consoles being unable to wake up from Rest Mode.
"PS4 software update 2.01 is rolling out today & will address issues some users have when powering on the system from Rest Mode," states the Tweet.
You'll find the update in the PS4 settings via the system software update option., or it probably will have been downloaded already.