Is there is any iron logic to sleep for Macbooks or does it sort of go with the weather?
13" late 2009 Macbook connected to an LCD screen, a usb tethered keyboard (irrelevant as it happens) and a bluetooth mouse, latest Snow Leopard, and both screens forming one desktop, (the MB screen usually turned down to zero)
If I log out and mouse over the sleep in the login window, it sleeps. But it invariably is a light sleep and wakes a few secs later. I do it again and it sleeps then. But, like an afternoon nap, it is deep and dreamy but wakes in about 10 or 15 minutes.
I am only confident of it going to sleep and *staying asleep* when logged out if I close the lid to put it to sleep.
If I am logged in, it stays asleep after Command Option Eject until a key is hit or a usb device is inserted or pulled out (I *think* the latter is right).