diff --git a/reactos/drivers/wdm/audio/backpln/portcls/power.c b/reactos/drivers/wdm/audio/backpln/portcls/power.c
index 3f0a4060c2c..9c1338963a3 100644
--- a/reactos/drivers/wdm/audio/backpln/portcls/power.c
+++ b/reactos/drivers/wdm/audio/backpln/portcls/power.c
@@ -36,3 +36,50 @@ PcRegisterAdapterPowerManagement(
     DeviceExt->AdapterPowerManagement = pPower;
     return STATUS_SUCCESS;
 }
+
+
+static
+VOID
+NTAPI
+PwrCompletionCallback(
+    IN PDEVICE_OBJECT DeviceObject,
+    IN UCHAR MinorFunction,
+    IN POWER_STATE PowerState,
+    IN PVOID Context,
+    IN PIO_STATUS_BLOCK IoStatus)
+{
+    KeSetEvent((PRKEVENT)Context, IO_NO_INCREMENT, FALSE);
+}
+
+/*
+ * @implemented
+ */
+NTSTATUS NTAPI
+PcRequestNewPowerState(
+    IN  PDEVICE_OBJECT DeviceObject,
+    IN  DEVICE_POWER_STATE RequestedNewState)
+{
+    KEVENT Event;
+    NTSTATUS Status;
+    POWER_STATE PowerState;
+    PCExtension* DeviceExt;
+
+    if (!DeviceObject || !RequestedNewState)
+        return STATUS_INVALID_PARAMETER;
+
+    DeviceExt = (PCExtension*)DeviceObject->DeviceExtension;
+    KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
+
+    PowerState.DeviceState = RequestedNewState;
+    PowerState.SystemState = PowerSystemUnspecified;
+
+    Status = PoRequestPowerIrp(DeviceExt->PhysicalDeviceObject, IRP_MN_SET_POWER, PowerState, PwrCompletionCallback, (PVOID)&Event, NULL);
+    if (NT_SUCCESS(Status))
+    {
+        KeWaitForSingleObject((PVOID)&Event, Executive, KernelMode, FALSE, NULL);
+    }
+
+
+    return Status;
+}
+
diff --git a/reactos/drivers/wdm/audio/backpln/portcls/stubs.c b/reactos/drivers/wdm/audio/backpln/portcls/stubs.c
index 775ded62fc4..63e0a2ebab3 100644
--- a/reactos/drivers/wdm/audio/backpln/portcls/stubs.c
+++ b/reactos/drivers/wdm/audio/backpln/portcls/stubs.c
@@ -12,29 +12,6 @@
 #include "private.h"
 #include <portcls.h>
 
-/*
-    Factory Stubs
-*/
-
-
-
-/* ===============================================================
-    Power Management
-*/
-
-/*
- * @unimplemented
- */
-NTSTATUS NTAPI
-PcRequestNewPowerState(
-    IN  PDEVICE_OBJECT pDeviceObject,
-    IN  DEVICE_POWER_STATE RequestedNewState)
-{
-    UNIMPLEMENTED;
-    return STATUS_UNSUCCESSFUL;
-}
-
-
 /* ===============================================================
     Properties
 */