C’est le sujet d’un webcast Technet que je vous recommande.

Il est accessible ici : http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?EventID=1032414346&EventCategory=5&culture=en-US&CountryCode=US _us

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Energy efficiency and green IT are two of the most active current topics in computing. In this webcast, we detail how the Windows 7 operating system helps improve energy efficiency through new power management innovations. We illustrate how IT professionals can improve battery life and power consumption using new Windows diagnostics utilities. We also show how applications can have a dramatic impact on power consumption, and we discuss how developers can optimize applications for energy efficiency. 

Presenter: Stephen Berard, Senior Program Manager, Microsoft Corporation, and Pat Stemen, Senior Program Manager, Microsoft Corporation
Pat Stemen is a Senior Program Manager on the Windows Kernel team, focusing on Windows power management infrastructure. Pat joined Microsoft in 2003 and has been focusing on sleep transition reliability and energy efficiency diagnostics.

On y voit notamment en démonstration comment débugger les problèmes de mise en veille à l’aide de la commande :

powercfg /requests