diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 791d2549..a6c5021c 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -2221,6 +2221,11 @@ namespace pv
     QWidget* MainWindow::GetBodyView()
     {
         return _view;
-    }   
+    }
+
+    void MainWindow::OnWindowsPowerEvent(bool bEnterSleep)
+    {
+        _session->ProcessPowerEvent(bEnterSleep);
+    }
   
 } // namespace pv
diff --git a/DSView/pv/mainwindow.h b/DSView/pv/mainwindow.h
index 0415c1b2..a43e0427 100644
--- a/DSView/pv/mainwindow.h
+++ b/DSView/pv/mainwindow.h
@@ -134,6 +134,8 @@ public:
     void switchLanguage(int language) override;
     bool able_to_close();    
     QWidget* GetBodyView();
+
+    void OnWindowsPowerEvent(bool bEnterSleep);
     
 private: 
 	void setup_ui();
diff --git a/DSView/pv/sigsession.cpp b/DSView/pv/sigsession.cpp
index 02ef29af..c82a6d24 100644
--- a/DSView/pv/sigsession.cpp
+++ b/DSView/pv/sigsession.cpp
@@ -2586,4 +2586,16 @@ namespace pv
         on_load_config_end();
     }
 
+    void SigSession::ProcessPowerEvent(bool bEnterSleep)
+    {
+        if (bEnterSleep){
+            if (_is_working && _device_agent.is_hardware()){
+                stop_capture();
+            }
+        }
+        else{
+            ds_reload_device_list();
+        }
+    }
+
 } // namespace pv
diff --git a/DSView/pv/sigsession.h b/DSView/pv/sigsession.h
index 9a2344cf..bfbba655 100644
--- a/DSView/pv/sigsession.h
+++ b/DSView/pv/sigsession.h
@@ -453,6 +453,8 @@ public:
 
     void apply_samplerate();
 
+    void ProcessPowerEvent(bool bEnterSleep);
+
 private:
     void set_cur_samplelimits(uint64_t samplelimits);
     void set_cur_snap_samplerate(uint64_t samplerate);
diff --git a/DSView/pv/winnativewidget.cpp b/DSView/pv/winnativewidget.cpp
index 7b866301..02e3c332 100644
--- a/DSView/pv/winnativewidget.cpp
+++ b/DSView/pv/winnativewidget.cpp
@@ -40,6 +40,7 @@
 #include "mainframe.h"
 #include "dsvdef.h"
 #include "appcontrol.h"
+#include "mainwindow.h"
 
 #define FIXED_WIDTH(widget) (widget->minimumWidth() >= widget->maximumWidth())
 #define FIXED_HEIGHT(widget) (widget->minimumHeight() >= widget->maximumHeight())
@@ -373,6 +374,28 @@ LRESULT CALLBACK WinNativeWidget::WndProc(HWND hWnd, UINT message, WPARAM wParam
             }
             break;
         }
+        case WM_POWERBROADCAST:
+        {
+            if (self->_childWidget != NULL)
+            {
+                dsv::MainFrame *frame = dynamic_cast<dsv::MainFrame*>(self->_childWidget);
+                dsv::MainWindow *mainWnd = dynamic_cast<dsv::MainWindow*>(frame->GetMainWindow());
+                switch (wParam)
+                {
+                case PBT_APMQUERYSUSPEND:
+                    dsv_info("Windows enters sleep.")
+                    mainWnd->OnWindowsPowerEvent(true);
+                    break;
+
+                case PBT_APMRESUMESUSPEND:
+                case PBT_APMRESUMECRITICAL:
+                    dsv_info("Windows be awaked.")
+                    mainWnd->OnWindowsPowerEvent(false);
+                    break;
+                }
+            }
+            break;
+        }
     }
 
     return DefWindowProc(hWnd, message, wParam, lParam);
diff --git a/libsigrok4DSL/lib_main.c b/libsigrok4DSL/lib_main.c
index f09fa4e6..743829f0 100644
--- a/libsigrok4DSL/lib_main.c
+++ b/libsigrok4DSL/lib_main.c
@@ -68,6 +68,7 @@ struct sr_lib_context
 	int transaction_id;
 	int transaction_command;
 	int last_error;
+	int is_reloading_list;
 };
 
 static void hotplug_event_listen_callback(struct libusb_context *ctx, struct libusb_device *dev, int event);
@@ -104,6 +105,7 @@ static struct sr_lib_context lib_ctx = {
 	.transaction_id = 0,
 	.transaction_command = DEV_TRANS_NONE,
 	.last_error = SR_OK,
+	.is_reloading_list = 0,
 };
 
 /**
@@ -1111,6 +1113,10 @@ SR_PRIV int sr_usb_device_is_exists(libusb_device *usb_dev)
 	struct sr_dev_inst *dev;
 	int bFind = 0;
 
+	if (lib_ctx.is_reloading_list){
+		return 0;
+	}
+
 	if (usb_dev == NULL)
 	{
 		sr_err("sr_usb_device_is_exists(), @usb_dev is null.");
@@ -1320,8 +1326,12 @@ static void process_attach_event(int isEvent)
 	struct sr_dev_driver **drivers;
 	GSList *dev_list;
 	GSList *l;
+	GSList *l_check;
 	struct sr_dev_driver *dr;
+	struct sr_dev_inst *sdi;
+	struct sr_dev_inst *new_sdi;
 	int num = 0;
+	int bFind;
 
 	if (isEvent){
 		sr_info("Process device attach event.");
@@ -1336,14 +1346,32 @@ static void process_attach_event(int isEvent)
 		if (dr->driver_type == DRIVER_TYPE_HARDWARE)
 		{
 			dev_list = dr->scan(NULL);
-			if (dev_list != NULL)
-			{
-				pthread_mutex_lock(&lib_ctx.mutext);
 
+			if (dev_list != NULL){
+				pthread_mutex_lock(&lib_ctx.mutext);
+				  
 				for (l = dev_list; l; l = l->next)
 				{
-					lib_ctx.device_list = g_slist_append(lib_ctx.device_list, l->data);
-					num++;
+					bFind = 0;
+					new_sdi = l->data;
+
+					for (l_check = lib_ctx.device_list; l_check; l_check = l_check->next)
+					{
+						sdi = l_check->data;
+						if (sdi->handle == new_sdi->handle){
+							bFind = 1;
+							break;
+						}
+					}
+
+					if (!bFind){
+						lib_ctx.device_list = g_slist_append(lib_ctx.device_list, l->data);
+						num++;
+					}
+					else{
+						sr_info("A device not appent to list, handle:%p", (void*)new_sdi->handle);
+						sr_dev_inst_free(new_sdi); //Not append to list, so free it.						
+					}					
 				}
 				pthread_mutex_unlock(&lib_ctx.mutext);
 				g_slist_free(dev_list);
@@ -1708,3 +1736,14 @@ SR_API int ds_get_last_error()
 {
 	return lib_ctx.last_error;
 }
+
+SR_API int ds_reload_device_list()
+{
+	sr_info("Reload device list.");
+
+	lib_ctx.is_reloading_list = 1;
+	process_attach_event(0);
+	lib_ctx.is_reloading_list = 0;
+
+	return SR_OK;
+}
diff --git a/libsigrok4DSL/libsigrok.h b/libsigrok4DSL/libsigrok.h
index e8f6b15d..175305fa 100644
--- a/libsigrok4DSL/libsigrok.h
+++ b/libsigrok4DSL/libsigrok.h
@@ -1478,6 +1478,8 @@ SR_API int ds_release_actived_device();
 
 SR_API int ds_get_last_error();
 
+SR_API int ds_reload_device_list();
+
 /*---config -----------------------------------------------*/
 SR_API int ds_get_actived_device_config(const struct sr_channel *ch,
                          const struct sr_channel_group *cg,