This has puzzled me for quite a while, and having found no solutions by myself I thought some of you might know what's going on.
Plug my laptop in. Hibernate Windows (Vista). Turn the laptop on and wait for the login screen to appear. Don't touch the keyboard/mouse. Wait for a few minutes (guesstimate: 3-4). Laptop will hibernate itself automagically.
I have auto-hibernation turned off for both plugged-in and battery powered. Furthermore, when I set Vista not to require password when waking up, the above doesn't happen - after 10 minutes the screensaver kicks in, but no auto-hibernation stuff going on!
How do I set my Vista up so that it doesn't auto hibernate after some inactivity on login screen straight after waking from hibernation?