Index: apps/screens.c
===================================================================
--- apps/screens.c	(revision 20139)
+++ apps/screens.c	(working copy)
@@ -91,6 +91,90 @@
 }
 #endif
 
+int handle_usb_events(struct event_queue *q)
+{
+    struct queue_event ev;
+#if defined(HAVE_USBSTACK) && defined(USE_ROCKBOX_USB)
+    int read_sectors_per_period[NUM_VOLUMES]={0};
+    int write_sectors_per_period[NUM_VOLUMES]={0};
+#endif
+    int next_update=0;
+
+    /* Don't return until we get SYS_USB_DISCONNECTED or SYS_TIMEOUT */
+    while(1)
+    {
+        queue_wait_w_tmo(q, &ev, 1);
+        switch(ev.id)
+        {
+            case SYS_USB_DISCONNECTED:
+                usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
+                return 0;
+#if defined(HAVE_USBSTACK) && defined(USE_ROCKBOX_USB)
+            case SYS_USB_LUN_LOCKED:
+                {
+                    int lun,value;
+                    lun=ev.data>>16;
+                    value=ev.data&0x0000ffff;
+                    if(value)
+                       screens[0].set_foreground(LCD_RGBPACK(0xff,0,0));
+                    else
+                       screens[0].set_foreground(LCD_RGBPACK(0,0xff,0));
+                    screens[0].fillrect(30,30*lun+40,20,20);
+                    break;
+                }
+            case SYS_USB_READ_DATA:
+                {
+                    int lun,value;
+                    lun=ev.data>>16;
+                    value=ev.data&0x0000ffff;
+                    read_sectors_per_period[lun]+=value;
+                    break;
+                }
+            case SYS_USB_WRITE_DATA:
+                {
+                    int lun,value;
+                    lun=ev.data>>16;
+                    value=ev.data&0x0000ffff;
+                    write_sectors_per_period[lun]+=value;
+                    break;
+                }
+#endif
+            case SYS_TIMEOUT:
+                break;
+        }
+        if(TIME_AFTER(current_tick,next_update))
+        {
+            if(usb_inserted()) {
+#if (CONFIG_STORAGE & STORAGE_MMC) /* USB-MMC bridge can report activity */
+                led(mmc_usb_active(HZ));
+#endif /* STORAGE_MMC */
+                gui_syncstatusbar_draw(&statusbars, false);
+            }
+#if defined(HAVE_USBSTACK) && defined(USE_ROCKBOX_USB)
+            int lun;
+            for(lun=0;lun<NUM_VOLUMES;lun++)
+            {
+                screens[0].set_foreground(LCD_RGBPACK(0,0,0));
+                screens[0].fillrect(60,30*lun+41,100,8);
+                screens[0].set_foreground(LCD_RGBPACK(0xff,0,0));
+                screens[0].fillrect(60,30*lun+41,read_sectors_per_period[lun]/40,8);
+
+                screens[0].set_foreground(LCD_RGBPACK(0,0,0));
+                screens[0].fillrect(60,30*lun+51,100,8);
+                screens[0].set_foreground(LCD_RGBPACK(0xff,0,0));
+                screens[0].fillrect(60,30*lun+51,write_sectors_per_period[lun]/40,8);
+
+                write_sectors_per_period[lun]=0;
+                read_sectors_per_period[lun]=0;
+            }
+            screens[0].update();
+            next_update=current_tick+HZ/5;
+#endif
+
+        }
+    }
+}
+
 void usb_screen(void)
 {
 #ifdef USB_NONE
@@ -142,14 +226,7 @@
     while (button_get(true) & BUTTON_REL);
 #else
     usb_acknowledge(SYS_USB_CONNECTED_ACK);
-    while(usb_wait_for_disconnect_w_tmo(&button_queue, HZ)) {
-        if(usb_inserted()) {
-#if (CONFIG_STORAGE & STORAGE_MMC) /* USB-MMC bridge can report activity */
-            led(mmc_usb_active(HZ));
-#endif /* STORAGE_MMC */
-            gui_syncstatusbar_draw(&statusbars, false);
-        }
-    }
+    while(handle_usb_events(&button_queue));
 #endif /* SIMULATOR */
 #ifdef HAVE_LCD_CHARCELLS
     status_set_usb(false);