diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 9047ffe5..56205fd6 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -106,6 +106,10 @@
 namespace pv
 {
 
+    namespace{
+        QString tmp_file;
+    }
+
     MainWindow::MainWindow(toolbars::TitleBar *title_bar, QWidget *parent)
         : QMainWindow(parent)
     {
@@ -318,7 +322,12 @@ namespace pv
             if (QFile::exists(ldFileName))
             {              
                 dsv_info("Auto load file:%s", file_name.c_str());
-                on_load_file(ldFileName);
+                tmp_file = ldFileName;
+  
+                QTimer::singleShot(300, this, [this](){
+                    on_load_file(tmp_file);
+                    tmp_file = "";
+                });
             }
             else
             {
@@ -326,10 +335,8 @@ namespace pv
                 MsgBox::Show(L_S(STR_PAGE_MSG, S_ID(IDS_MSG_OPEN_FILE_ERROR), "Open file error!"), ldFileName, NULL);
             }
         }
-        else
-        {
-            _session->set_default_device();
-        }
+
+        _session->set_default_device();
     }
 
     //*
diff --git a/DSView/pv/sigsession.cpp b/DSView/pv/sigsession.cpp
index 6d40737a..93ac8ea6 100644
--- a/DSView/pv/sigsession.cpp
+++ b/DSView/pv/sigsession.cpp
@@ -2447,4 +2447,17 @@ namespace pv
         }
     }
 
+    void SigSession::update_dso_data_scale()
+    {
+        if (_device_agent.get_work_mode() == DSO)
+        { 
+            for(auto s : _signals){
+                if (s->get_type() == SR_CHANNEL_DSO){
+                    view::DsoSignal *ch = (view::DsoSignal*)s;
+                    _capture_data->get_dso()->set_data_scale(ch->get_scale(), ch->get_index());                                                 
+                }
+            }
+        }
+    }
+
 } // namespace pv
diff --git a/DSView/pv/sigsession.h b/DSView/pv/sigsession.h
index 184fed34..1ae39acd 100644
--- a/DSView/pv/sigsession.h
+++ b/DSView/pv/sigsession.h
@@ -429,6 +429,8 @@ public:
         _decoder_pannel = pannel;
     }
 
+    void update_dso_data_scale();
+
 private:
     void set_cur_samplelimits(uint64_t samplelimits);
     void set_cur_snap_samplerate(uint64_t samplerate);
diff --git a/DSView/pv/view/view.cpp b/DSView/pv/view/view.cpp
index 49577410..a8d8b324 100644
--- a/DSView/pv/view/view.cpp
+++ b/DSView/pv/view/view.cpp
@@ -778,6 +778,7 @@ void View::signals_changed(const Trace* eventTrace)
             }
         }
         _time_viewport->clear_measure();
+        _session->update_dso_data_scale();
     }
 
     header_updated();