diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/class/hub/usbh_hub.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/class/hub/usbh_hub.c
index b3edd9419..fb14a72ea 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/class/hub/usbh_hub.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/class/hub/usbh_hub.c
@@ -23,6 +23,7 @@ Modification: rndis uses naive_mmap to assign virtual and physical addresses and
 #include "usb_def.h"
 #include "usyscall.h"
 
+extern void xhci_dump_port_status_debug(int id); //Debugging function
 
 #define DEV_FORMAT "/usb%d/hub%d"
 
@@ -696,8 +697,9 @@ static void usbh_hub_thread(void *argument)
     usb_hc_init(usb->id);
     while (1) {
         USB_LOG_DBG("wait event of mq@%p \r\n", usb->hub_mq);
-        ret = usb_osal_mq_recv(usb->hub_mq, (void *)&hub, 0x7fffffff);
+        ret = usb_osal_mq_recv(usb->hub_mq, (void *)&hub, 10000);
         if (ret <= 0) {
+            xhci_dump_port_status_debug(usb->id);
             continue;
         }
         USB_LOG_DBG("handle event of hub@%p \r\n", hub);
diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
index 536e90929..45f5a9145 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
@@ -666,8 +666,6 @@ int xhci_probe ( struct xhci_host *xhci, unsigned long baseaddr ) {
 		port->protocol = xhci_port_protocol ( xhci, i );
 	}
 
-	xhci_dump(xhci);
-
     return error;
 
 err_reset:
@@ -1271,6 +1269,8 @@ int xhci_open ( struct xhci_host *xhci ) {
 	/* Start controller */
 	xhci_run ( xhci );
 
+	xhci_dump(xhci);
+
 	return 0;
 
 	xhci_stop ( xhci );
@@ -3072,6 +3072,19 @@ void xhci_dump(struct xhci_host *xhci){
 
 /* Dump Port status */
 void xhci_dump_port_status(uint32_t port, uint32_t portsc) {
+    USB_LOG_DBG("XHCI port %d portsc %08x\n", port, portsc );
+}
+//Debugging function
+void xhci_dump_port_status_debug(int id) {
+    uint32_t portsc;
+    struct usbh_bus *bus = usbh_get_bus_of_index(id);
+    struct xhci_host *xhci = (struct xhci_host *)bus->priv;
+
+    USB_LOG_DBG("xhci_status_debug xhci->op_addr + port1 = %08lx\n", xhci->op_addr + XHCI_OP_PORTSC ( 1 ));
+    portsc = readl ( xhci->op_addr + XHCI_OP_PORTSC ( 1 ) );
+    USB_LOG_DBG("xhci_status_debug port=1 portsc=%08x\n", portsc);
+    portsc = readl ( xhci->op_addr + XHCI_OP_PORTSC ( 2 ) );
+    USB_LOG_DBG("xhci_status_debug port=2 portsc=%08x\n", portsc);
 }
 
 /* Dump input context */