Settings > Display > Daydream I have
- selected one (any one, but right now it's just the standard Clock) - when to daydream = either docked or charging
- "start now" works fine.
I've connected my Nexus 4 by USB cable to a wall charger and "Clock" confirms Charging (AC), 45%
Settings > Display > Sleep is set to 15 seconds while I try to get daydreaming to work. If/when it works, I'll probably set it to 2 minutes.
Despite the above settings, and being on AC power, the phone never daydreams. Why not?
This is a Nexus 4 with stock 4.2.2, not rooted, not superuser'ed (yet).