I managed to get hibernation on my desktop after disabling Hybrid Sleep.

After hibernating for several hours, I resume the computer.
After the 'Resuming Windows...' screen, I see a blinking underscore in the top-left corner of the screen for 2 minutes before the desktop appears. Why?

If you can't truck it,Trak it !
Just a few things going on as explained here.
Stay awake now ! Don't fall asleep or hibernate on us.
http://lwn.net/Articles/243404/

As far as personal resting methods I prefer hibernating. I love bears !
davey

Have a read of this thread Amtrak, lots of vista users with similar problems

http://www.howtogeek.com/howto/windows-vis...rid-sleep-mode/

I have an APC BACK-UPS ES 350 battery backup to prevent the frequent 5 second power blips we get here in the morning from powering down my XP Pro system and it enables the Hibernate feature for fast recovery.

It works great.

I don't have Vista yet.