diff --git a/firmware/export/config.h b/firmware/export/config.h
index 95f38c5995..f5ee003308 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -733,6 +733,12 @@ Lyre prototype 1 */
 
 #endif /* BOOTLOADER */
 
+#ifdef PHILIPS_SA9200
+/* Instead use the request for a device descriptor to detect a host */
+#undef USB_DETECT_BY_DRV
+#define USB_DETECT_BY_CORE
+#endif
+
 #if defined(HAVE_USBSTACK) || (CONFIG_CPU == JZ4732) \
     || (CONFIG_CPU == AS3525) || (CONFIG_CPU == AS3525v2) \
     || defined(CPU_S5L870X) || (CONFIG_CPU == S3C2440) \
diff --git a/firmware/export/usb.h b/firmware/export/usb.h
index e192748e4d..aceecb55ae 100644
--- a/firmware/export/usb.h
+++ b/firmware/export/usb.h
@@ -33,10 +33,11 @@
 enum {
     USB_EXTRACTED = 0,       /* Event+State */
     USB_INSERTED,            /* Event+State */
-#if defined(HAVE_USB_POWER) || defined(USB_DETECT_BY_DRV)
+#if defined(HAVE_USB_POWER) || defined(USB_DETECT_BY_DRV) || \
+    defined(USB_DETECT_BY_CORE)
     USB_POWERED,             /* Event+State */
 #endif
-#ifdef USB_DETECT_BY_DRV
+#if defined(USB_DETECT_BY_DRV) || defined(USB_DETECT_BY_CORE)
     USB_UNPOWERED,           /* Event */
 #endif
 #ifdef HAVE_LCD_BITMAP
diff --git a/firmware/target/arm/system-pp502x.c b/firmware/target/arm/system-pp502x.c
index bd71d28417..0422ea7d9c 100644
--- a/firmware/target/arm/system-pp502x.c
+++ b/firmware/target/arm/system-pp502x.c
@@ -141,9 +141,7 @@ void __attribute__((interrupt("IRQ"))) irq_handler(void)
         else if (CPU_HI_INT_STAT & GPIO0_MASK) {
             if (GPIOD_INT_STAT & 0x02)
                 button_int();
-        }
-        else if (CPU_HI_INT_STAT & GPIO1_MASK) {
-            if (GPIOF_INT_STAT & 0x80)
+            if (GPIOB_INT_STAT & 0x40)
                 usb_insert_int();
         }
 /* end PHILIPS_SA9200 */
diff --git a/firmware/target/arm/usb-drv-arc.c b/firmware/target/arm/usb-drv-arc.c
index 86a1637bc8..fc74ce5bf0 100644
--- a/firmware/target/arm/usb-drv-arc.c
+++ b/firmware/target/arm/usb-drv-arc.c
@@ -498,15 +498,23 @@ static void log_ep(int ep_num, int ep_dir, char* prefix)
 
 void usb_drv_init(void)
 {
+#ifdef USB_DETECT_BY_CORE
+    /* USB core decides */
+    _usb_drv_init(true);
+#else
+    /* Use bus reset condition */
     _usb_drv_init(false);
+#endif
 }
 
 /* fully enable driver */
 void usb_drv_attach(void)
 {
     logf("usb_drv_attach");
+#ifndef USB_DETECT_BY_CORE
     sleep(HZ/10);
     _usb_drv_init(true);
+#endif
 }
 
 void usb_drv_exit(void)
diff --git a/firmware/target/arm/usb-fw-pp502x.c b/firmware/target/arm/usb-fw-pp502x.c
index 8f754fd04b..536535e059 100644
--- a/firmware/target/arm/usb-fw-pp502x.c
+++ b/firmware/target/arm/usb-fw-pp502x.c
@@ -65,10 +65,10 @@
 #define USB_GPIO_VAL    0x04
 
 #elif defined(PHILIPS_SA9200)
-    /* GPIO F bit 7 (low) is usb detect */
-#define USB_GPIO        GPIOF
-#define USB_GPIO_MASK   0x80
-#define USB_GPIO_VAL    0x00
+    /* GPIO B bit 6 (high) is usb bus power detect */
+#define USB_GPIO        GPIOB
+#define USB_GPIO_MASK   0x40
+#define USB_GPIO_VAL    0x40
 
 #elif defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330)
     /* GPIO E bit 2 is usb detect */
@@ -225,10 +225,12 @@ void usb_insert_int(void)
     timeout_register(&usb_oneshot, usb_timeout_event, HZ/5, val);
 }
 
-/* Called during the bus reset interrupt when in detect mode - filter for
- * invalid bus reset when unplugging by checking the pin state. */
+/* USB_DETECT_BY_DRV: Called during the bus reset interrupt when in detect mode
+ * USB_DETECT_BY_CORE: Called when device descriptor is requested
+ */
 void usb_drv_usb_detect_event(void)
 {
+    /* Filter for invalid bus reset when unplugging by checking the pin state. */
     if(usb_plugged()) {
         usb_status_event(USB_INSERTED);
     }
diff --git a/firmware/usb.c b/firmware/usb.c
index c8f0118730..ca0e86b478 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -136,7 +136,7 @@ static inline void usb_slave_mode(bool on)
     }
     else /* usb_state == USB_INSERTED (only!) */
     {
-#ifndef USB_DETECT_BY_DRV
+#if !defined(USB_DETECT_BY_DRV) && !defined(USB_DETECT_BY_CORE)
         usb_enable(false);
 #endif
 #ifdef HAVE_PRIORITY_SCHEDULING
@@ -244,7 +244,7 @@ static void usb_thread(void)
                     (struct usb_transfer_completion_event_data*)ev.data);
                 break;
 #endif
-#ifdef USB_DETECT_BY_DRV
+#if defined(USB_DETECT_BY_DRV) || defined(USB_DETECT_BY_CORE)
             /* In this case, these events the handle cable insertion USB
              * driver determines INSERTED/EXTRACTED state. */
             case USB_POWERED:
@@ -263,7 +263,7 @@ static void usb_thread(void)
                  * available. */
                 queue_post(&usb_queue, USB_EXTRACTED, 0);
                 break;
-#endif /* USB_DETECT_BY_DRV */
+#endif /* USB_DETECT_BY_DRV || USB_DETECT_BY_CORE */
             case USB_INSERTED:
 #ifdef HAVE_LCD_BITMAP
                 if(do_screendump_instead_of_usb)
@@ -379,7 +379,8 @@ static void usb_thread(void)
 #ifdef HAVE_USBSTACK
                 if(!exclusive_storage_access)
                 {
-#ifndef USB_DETECT_BY_DRV /* Disabled handling USB_UNPOWERED */
+#if !defined(USB_DETECT_BY_DRV) && !defined(USB_DETECT_BY_CORE)
+                    /* Disabled handling USB_UNPOWERED */
                     usb_enable(false);
 #endif
                     break;
@@ -457,7 +458,8 @@ void usb_status_event(int current_status)
 {
     /* Caller isn't expected to filter for changes in status.
      * current_status:
-     *   USB_DETECT_BY_DRV: USB_POWERED, USB_UNPOWERED, USB_INSERTED (driver)
+     *   USB_DETECT_BY_DRV/CORE: USB_POWERED, USB_UNPOWERED,
+                                 USB_INSERTED (driver/core)
      *                else: USB_INSERTED, USB_EXTRACTED
      */
     if(usb_monitor_enabled)
@@ -481,7 +483,10 @@ void usb_start_monitoring(void)
 
     usb_monitor_enabled = true;
 
-#ifdef USB_DETECT_BY_DRV
+#ifdef USB_STATUS_BY_EVENT
+    /* Filter the status - an event may have been missed because it was
+     * sent before monitoring was enabled due to the connector already
+     * having been inserted before before or during boot. */
     status = (status == USB_INSERTED) ? USB_POWERED : USB_UNPOWERED;
 #endif
     usb_status_event(status);
@@ -577,7 +582,7 @@ void usb_init(void)
 {
     /* We assume that the USB cable is extracted */
     usb_state = USB_EXTRACTED;
-#ifdef USB_DETECT_BY_DRV
+#if defined(USB_DETECT_BY_DRV) || defined(USB_DETECT_BY_CORE)
     last_usb_status = USB_UNPOWERED;
 #else
     last_usb_status = USB_EXTRACTED;
diff --git a/firmware/usbstack/usb_core.c b/firmware/usbstack/usb_core.c
index 2ff3f325a2..aa96fff17f 100644
--- a/firmware/usbstack/usb_core.c
+++ b/firmware/usbstack/usb_core.c
@@ -559,6 +559,11 @@ static void request_handler_device_get_descriptor(struct usb_ctrlrequest* req)
         case USB_DT_DEVICE:
             ptr = &device_descriptor;
             size = sizeof(struct usb_device_descriptor);
+#ifdef USB_DETECT_BY_CORE
+            /* Something requested a device descriptor; consider this a legit
+               connection */
+            usb_drv_usb_detect_event();
+#endif
             break;
 
         case USB_DT_OTHER_SPEED_CONFIG: