Check with Dell. I have an E521. 520 and 521 have many Vista issues. I don't have Vista yet, still waiting for express upgrade.
Hi, I got a new Dell E520 and have enabled the hibernation feature of Vista. Its very strange but when I boot up from hibernating and don't do anything at all with the PC it immediately or within a minute goes back into hibernation. If I move the mouse when it starts up then it is fine.
This is very irritating because sometimes I like to start up the PC whilst I do something else but when I come back to it it is hibernating again.
Can anyone check if this happens with their Dell or is it a bug in Vista?
Cheers.

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