Hi,
I enabled Hyper-V role in the Microsoft Windows Server 2012 on testing computer (PC with i7 CPU and 16GB RAM). I found very strange behavior. The sleep mode was enabled and after command “powercfg /hibernation on” the hibernation is also working.
I tested sleep (S3) and hibernation with started hypervisor and with running virtual machine. I tested sleep and hibernation triggered by power button and even with time-out that was set in the Power Options (I set sleep after 1 minute and
later hibernate after 1 minute and wait).
Sleep and hibernation is working! I do not understand why. Sleep and hibernation should be functional only on Client Hyper-V on Windows 8 and not on the Server 2012.
Some examples:
--------------------------------
Testing workstation (i7, 16GB RAM) with Server 2012 and with started hypervisor:
--------------------------------
C:\Users\Administrator>powercfg /a
The following sleep states are available on this system:
Standby (S3)
Hibernate
Fast Startup
The following sleep states are not available on this system:
Standby (S1)
The system firmware does not support this standby state.
Standby (S2)
The system firmware does not support this standby state.
Standby (Connected)
The hypervisor does not support this standby state.
The system firmware does not support this standby state.
Hybrid Sleep
The hypervisor does not support this standby state.
--------------------------------
My laptop (i5, 8GB RAM) with Server 2012 and with started hypervisor:
--------------------------------
>powercfg /a
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.
--------------------------------
R. Revil
Relef Revil