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Hypervisor disables Sleep and Hibernate on Windows Server 2012R2! Why? How to solve?

Hi,

according to the official documentation of Microsoft, Hyper-V does not block Sleep and Hibernate on Windows Server 2012 and Windows Server 2012 R2.

From powercfg I get the following output:

The following sleep states are not available on this system: Standby (S1) The system firmware does not support this standby state. An internal system component has disabled this standby state. Hypervisor Standby (S2) The system firmware does not support this standby state. An internal system component has disabled this standby state. Hypervisor Standby (S3) An internal system component has disabled this standby state. Hypervisor Hibernate An internal system component has disabled hibernation. Hypervisor Standby (Connected) The hypervisor does not support this standby state. The system firmware does not support this standby state. Hybrid Sleep Standby (S3) is not available. Hibernation is not available. The hypervisor does not support this standby state. Fast Startup Hibernation is not available.

I already installed a graphics device driver to prevent the graphics device from blocking Sleep and Hyper-V. So this should not be an issue.

What can I do to enable Sleep and Hibernate?

Regards,

Daniel

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