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#11
You refer to sleep/hibernate as though they are the same thing. They are very different. When a computer is asleep, it is still "on" for all intents and purposes. It is simply in a low-power state. Sleep can be ended by the lid opening because the OS is still technically "listening." In hibernation, the computer is completely off. All volatile information has been saved to the hard drive. You would have to press a power button to come back from hibernation.
Personally, I don't allow computers to sleep or hibernate. Both are usually more trouble than they are worth. I'd rather start fresh.