Is power management supported for virtual machines running on Hyper-V?

Question

Hello

What I need is the guest virtual machine running on Hyper-V to be able to use power management features including hibernation.

For S1-S4 power management in Hyper-V virtual machines, but encountering an error when enabling hibernate using "powercfg /h on," which says, "The system firmware does not support."

Accepted Answer

Hi,

Please try the following to see if it works.

Disable dynamic memory on the VM since it's incompatible with hibernation.
Run the following PowerShell script on the host:


Param (
    [string]$VmName,
    [bool]$Enable = $true
)

# To modify, machine must be off
$Vm = Get-VM -Name $VmName
$Vm | Stop-VM -Force -WarningAction Ignore

$wmiComputerSystem = gwmi -namespace root\virtualization\v2 -query "select * from Msvm_ComputerSystem where ElementName= '$VmName'"
$wmi_vsSettingData = $wmiComputerSystem.GetRelated("Msvm_VirtualSystemSettingData","Msvm_SettingsDefineState",$null,$null, "SettingData", "ManagedElement", $false, $null)
 
Write-Output ("Before: EnableHibernation = " + $wmi_vsSettingData.EnableHibernation)

# $wmi_vsSettingData.EnableHibernation = $Enable  # Doesn't work - says The property 'EnableHibernation' cannot be found on this object
# So, need to munge XML ourselves
[xml]$vsSettingsDataXml = $wmi_vsSettingData.gettext(1)
$EnableHibernationNodes = $vsSettingsDataXml.SelectNodes("/INSTANCE/PROPERTY[@NAME='EnableHibernation']")
$EnableHibernationNodes[0].VALUE=$Enable.ToString()

$wmi_vsSettingDataMgmt = Get-WmiObject -Namespace "root\virtualization\v2" -Class Msvm_VirtualSystemManagementService
$job = $wmi_vsSettingDataMgmt.ModifySystemSettings($vsSettingsDataXml.OuterXml)

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Is power management supported for virtual machines running on Hyper-V?

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