diff --git a/DSView/pv/sigsession.cpp b/DSView/pv/sigsession.cpp
index 7922cffe..9490057e 100644
--- a/DSView/pv/sigsession.cpp
+++ b/DSView/pv/sigsession.cpp
@@ -455,12 +455,16 @@ namespace pv
         int run_dex = 0;
         clear_all_decode_task(run_dex);
         
-        // If switch the data buffer
+        _view_data->clear();
+
+        // If switch the data buffer    
         if (_view_data != _capture_data){
             _capture_data->clear();
             _capture_data = _view_data;
         }
 
+        init_signals();
+
         // update setting
         if (_device_agent.is_file())
             _is_instant = true;