I have X 10.12 running on a Pismo Powerbook (386 RAM). Powerbook will sleep if I close lid or select sleep and it wakes fine. But ipowerbook will not automatically go to sleep at time set in energy saver. It will dim and then provide a blank screen - but the hard disk keeps running.
Again wakes without crash - but automatic sleep not working -- worked ok when I first installed 10.1 -- any suggestions?