|laziness, impatience, and hubris|
Powersave mode? All the computers I've dealt with don't awaken from "power save mode;" it's more like a coma. "Awakening" them requires a power cycle. On my laptop, this required removing the battery.
Needless to say, I've disabled "powersaving" for my computers. The monitors will still go into their powersaving modes, but the box with all the noisy bits stays awake.
My Windows boxes ignore mouse movements in powersave (Why? I don't know nor do I particularly care), so I bang on the space bar (it's big and hard to miss). My FreeBSD box does pay attention to the mouse, so I just waggle it wildly.
At that time  the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.—Igor Sikorsky, reported in AOPA Pilot magazine February 2003.
In reply to Re: I wake up my computer from power-save mode by...