When you enable the Hyper-V role on Windows Server 2008 support for sleep / hibernate will be disabled. The reason for this is that supporting these features on a hypervisor based system is incredibly complicated – and Hyper-V is designed to run on servers – where sleep and hibernate are not used.
To answer some common questions:
- What about other aspects of power management?
Other power management methods (changing processor speed, entering low power states, etc…) are still functional with Hyper-V is enabled.
- Is there some way that I can “hack” the system to re-enable sleep / hibernate with Hyper-V?
- But I want to run Hyper-V on my laptop!
Good for you. I run Hyper-V on a tablet myself (with 320GB 7200 RPM disks and 4GB ram). But you will either need to live without sleep / hibernate – or dual boot your system (I actually triple boot my tablet).