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Change to a Different Power Package

The following steps describe how to change to a different power package.

1.  Find the instance of CIM_ComputerSystem representing the Intel AMT, as described in Discovering CIM_ComputerSystem.

2.  From the CIM_ComputerSystem instance, traverse the CIM_ElementSettingData associations to find the instances of AMT_SystemPowerScheme.

3.  Enumerate all packages by invoking AMT_SystemPowerScheme.Enumerate.

4.  Invoke AMT_SystemPowerScheme.Pull and compare SchemeGUID in each instance with the GUID of the of the power package you want to activate.

5.  After finding the desired instance, invoke AMT_SystemPowerScheme.SetPowerScheme on this instance.

Click here for a snippet demonstrating this step

You can execute this snippet by inserting it into the execution template found here.

  

$schemeGUID =# The giud of the powerpackage you want to activate.

# Create a reference to the CIM_ComputerSystem instance.

$computerSystemRef =$wsmanConnectionObject.NewReference("SELECT * FROM CIM_ComputerSystem WHERE Name='Intel(r) AMT'")

$elementSettingsDataRef =$wsmanConnectionObject.NewReference("CIM_ElementSettingData")

$elementSettingsDataRef.AddSelector("ManagedElement",$computerSystemRef)

# Traverse to the CIM_ElementSettingData instances that are connected to CIM_ComputerSystem.

foreach($elementSettingDataItem in$elementSettingsDataRef.Enumerate("http://schemas.dmtf.org/wbem/wsman/1/wsman/SelectorFilter",$null))

{

    # For each instance, check if it is associated to the AMT_SystemPowerScheme instance.

if($elementSettingDataItem.Object.GetProperty("SettingData").IsA("AMT_SystemPowerScheme"))

    {

          $systemPowerSchemeInstance =$elementSettingDataItem.Object.GetProperty("SettingData").Ref.Get()

          if($systemPowerSchemeInstance.GetProperty("SchemeGUID") -like $schemeGUID)

          {

                # Get the AMT_systemPowerScheme object using its EPR.

                $systemPowerSchemeRef =$elementSettingDataItem.Object.GetProperty("SettingData").Ref

                $inputObject =$systemPowerSchemeRef.CreateMethodInput("SetPowerScheme")

                $outputObject =$systemPowerSchemeRef.InvokeMethod($inputObject)

                $returnValue =$outputObject.GetProperty("ReturnValue")

                break

          }

    }

}

 

 

Additional Information

Power package settings do not revert to default values after unprovisioning as this is a platform setting and Unprovisioning applies only to Intel AMT parameters.

Instance Diagram

Classes Used in This Flow

SDK Sample

If there is a sample demonstrating this flow, it is included in the SDK installation file. See SDK Installation Layout for details.

 

See Also:

   List of Power Packages

 

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