diff --git a/drivers/usb/usbehci_new/interfaces.h b/drivers/usb/usbehci_new/interfaces.h
index 295f11eb12a..242ffb16611 100644
--- a/drivers/usb/usbehci_new/interfaces.h
+++ b/drivers/usb/usbehci_new/interfaces.h
@@ -301,6 +301,15 @@ DECLARE_INTERFACE_(IUSBHardwareDevice, IUnknown)
 // Description: releases the device lock
 
     virtual void ReleaseDeviceLock(KIRQL OldLevel) = 0;
+
+	    // set command
+    virtual void SetCommandRegister(struct _EHCI_USBCMD_CONTENT *UsbCmd) = 0;
+
+    // get command
+    virtual void GetCommandRegister(struct _EHCI_USBCMD_CONTENT *UsbCmd) = 0;
+
+
+
 };
 
 typedef IUSBHardwareDevice *PUSBHARDWAREDEVICE;
diff --git a/drivers/usb/usbehci_new/usb_queue.cpp b/drivers/usb/usbehci_new/usb_queue.cpp
index a0a8b729e15..6b83f7d7402 100644
--- a/drivers/usb/usbehci_new/usb_queue.cpp
+++ b/drivers/usb/usbehci_new/usb_queue.cpp
@@ -141,6 +141,11 @@ CUSBQueue::Initialize(
     //
     Status = InitializeSyncSchedule(Hardware, MemManager);
 
+    //
+    // store hardware object
+    //
+    m_Hardware = Hardware;
+
     return Status;
 }
 
@@ -358,6 +363,13 @@ CUSBQueue::AddUSBRequest(
         KeAcquireSpinLock(m_Lock, &OldLevel);
         LinkQueueHead(AsyncListQueueHead, QueueHead);
         KeReleaseSpinLock(m_Lock, OldLevel);
+
+        EHCI_USBCMD_CONTENT UsbCmd;
+        m_Hardware->GetCommandRegister(&UsbCmd);
+        ASSERT(UsbCmd.AsyncEnable == TRUE);
+
+        m_Hardware->SetAsyncListRegister(QueueHead->PhysicalAddr);
+
     }
 
 
@@ -419,6 +431,7 @@ CUSBQueue::LinkQueueHead(
     //
     // Link the LIST_ENTRYs
     //
+    ASSERT(IsListEmpty(&HeadQueueHead->LinkedQueueHeads));
     InsertTailList(&HeadQueueHead->LinkedQueueHeads, &NewQueueHead->LinkedQueueHeads);
 
     //
@@ -426,6 +439,7 @@ CUSBQueue::LinkQueueHead(
     //
     Entry = NewQueueHead->LinkedQueueHeads.Blink;
     LastQueueHead = CONTAINING_RECORD(Entry, QUEUE_HEAD, LinkedQueueHeads);
+    ASSERT(LastQueueHead == HeadQueueHead);
     LastQueueHead->HorizontalLinkPointer = (NewQueueHead->PhysicalAddr | QH_TYPE_QH);
 
     //
@@ -435,6 +449,11 @@ CUSBQueue::LinkQueueHead(
     NextQueueHead = CONTAINING_RECORD(Entry, QUEUE_HEAD, LinkedQueueHeads);
     ASSERT(NextQueueHead == HeadQueueHead);
     NewQueueHead->HorizontalLinkPointer = (NextQueueHead->PhysicalAddr | QH_TYPE_QH);
+
+    //
+    // head queue head must be halted
+    //
+    PC_ASSERT(HeadQueueHead->Token.Bits.Halted == TRUE);
 }
 
 //
diff --git a/drivers/usb/usbehci_new/usb_request.cpp b/drivers/usb/usbehci_new/usb_request.cpp
index 38618d257fc..aff29cbd55e 100644
--- a/drivers/usb/usbehci_new/usb_request.cpp
+++ b/drivers/usb/usbehci_new/usb_request.cpp
@@ -767,7 +767,14 @@ CUSBRequest::BuildControlTransferQueueHead(
     // link transfer descriptors to queue head
     //
     QueueHead->NextPointer = m_TransferDescriptors[0]->PhysicalAddr;
+/*
+	if (m_TransferBufferMDL)
+	    QueueHead->AlternateNextPointer = m_TransferDescriptors[2]->PhysicalAddr;
+	else
+	    QueueHead->AlternateNextPointer = m_TransferDescriptors[1]->PhysicalAddr;
 
+	QueueHead->EndPointCapabilities.InterruptScheduleMask = 0x0;
+*/
     //
     // store result
     //