diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 8af1de6d..d4320268 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -117,7 +117,7 @@ namespace pv
         _is_auto_switch_device = false;
         _is_save_confirm_msg = false;
 
-        _pattern_mode = "RANDOM";
+        _pattern_mode = "random";
 
         setup_ui();
 
@@ -1779,7 +1779,7 @@ namespace pv
                     {
                         _view->auto_set_max_scale();
 
-                        if(_pattern_mode != "RANDOM")
+                        if(_pattern_mode != "random")
                         {
                             StoreSession ss(_session);
                             QJsonArray deArray = get_decoder_json_from_file(_device_agent->path());
@@ -1833,7 +1833,7 @@ namespace pv
 
                 if(_device_agent->get_work_mode() == LOGIC)
                 {
-                    if(_pattern_mode != "RANDOM")
+                    if(_pattern_mode != "random")
                     {
                         _device_agent->update();
                         StoreSession ss(_session);
@@ -1948,7 +1948,7 @@ namespace pv
 
                         _protocol_widget->del_all_protocol();
                          
-                        if(_pattern_mode != "RANDOM")
+                        if(_pattern_mode != "random")
                         {
                             StoreSession ss(_session);
                             QJsonArray deArray = get_decoder_json_from_file(_device_agent->path());
diff --git a/DSView/pv/sigsession.cpp b/DSView/pv/sigsession.cpp
index 325498ca..f9f5dfe1 100644
--- a/DSView/pv/sigsession.cpp
+++ b/DSView/pv/sigsession.cpp
@@ -528,7 +528,7 @@ namespace pv
                     QString rand_mode = g_variant_get_string(gvar,NULL);
                     g_variant_unref(gvar);
 
-                    if (rand_mode != "RANDOM"){
+                    if (rand_mode != "random"){
                         set_operation_mode(OPT_SINGLE);
                     }
                 }
diff --git a/DSView/pv/toolbars/samplingbar.cpp b/DSView/pv/toolbars/samplingbar.cpp
index 49630f55..cccf36c9 100644
--- a/DSView/pv/toolbars/samplingbar.cpp
+++ b/DSView/pv/toolbars/samplingbar.cpp
@@ -1275,7 +1275,7 @@ namespace pv
                     QString rand_mode = g_variant_get_string(gvar,NULL);
                     g_variant_unref(gvar);
 
-                    bool is_rand = rand_mode.toUpper() == "RANDOM";
+                    bool is_rand = rand_mode.toUpper() == "random";
                     _action_loop->setVisible(is_rand);
                     
                     if (!is_rand){
diff --git a/libsigrok4DSL/hardware/demo/demo.c b/libsigrok4DSL/hardware/demo/demo.c
index a20af9ab..a3ab84ad 100644
--- a/libsigrok4DSL/hardware/demo/demo.c
+++ b/libsigrok4DSL/hardware/demo/demo.c
@@ -207,7 +207,8 @@ static int get_pattern_mode_from_file(uint8_t device_mode)
 
     strcpy(dir_str,DS_RES_PATH);
     strcat(dir_str,"../");
-    strcat(dir_str,"demo-file/");
+    strcat(dir_str,"demo/");
+    sr_info("%s",dir_str);
 
     if(device_mode == LOGIC)
         strcat(dir_str,"logic/");
@@ -227,10 +228,10 @@ static int get_pattern_mode_from_file(uint8_t device_mode)
     {
         if (FALSE == g_file_test(filename,G_FILE_TEST_IS_DIR))
         {
-            if(strstr(filename,".dsl") != NULL)
+            if(strstr(filename,".demo") != NULL)
             {
-                char *tmp_file_name = g_try_malloc0(strlen(filename)-strlen(".dsl")+1);
-                snprintf(tmp_file_name, strlen(filename)-strlen(".dsl")+1 , "%s", filename);
+                char *tmp_file_name = g_try_malloc0(strlen(filename)-strlen(".demo")+1);
+                snprintf(tmp_file_name, strlen(filename)-strlen(".demo")+1 , "%s", filename);
                 if(device_mode == LOGIC)
                     pattern_strings_logic[index] = tmp_file_name;
                 else if(device_mode == DSO)
@@ -276,6 +277,7 @@ static int scan_dsl_file(struct sr_dev_inst *sdi)
         sample_generator = PATTERN_RANDOM;
         sdi->mode = LOGIC;
         reset_dsl_path(sdi,LOGIC,PATTERN_RANDOM);
+        sr_info("path:%s",sdi->path);
     }
 }
 
@@ -288,7 +290,7 @@ static int reset_dsl_path(struct sr_dev_inst *sdi,uint8_t device_mode ,uint8_t p
     char *str = g_try_malloc0(500);
     strcpy(str,DS_RES_PATH);
     strcat(str,"../");
-    strcat(str,"demo-file/");
+    strcat(str,"demo/");
 
     if (pattern_mode != PATTERN_RANDOM)
     {
@@ -318,7 +320,7 @@ static int reset_dsl_path(struct sr_dev_inst *sdi,uint8_t device_mode ,uint8_t p
         default:
             break;
         }
-        strcat(str,".dsl");
+        strcat(str,".demo");
     }
 
     if(pattern_mode != PATTERN_RANDOM)
@@ -2305,6 +2307,7 @@ static int load_virtual_device_session(struct sr_dev_inst *sdi)
     }
     else
     {
+        sr_info("%s",sdi->path);
         archive = unzOpen64(sdi->path);
         if (NULL == archive)
         {
diff --git a/libsigrok4DSL/hardware/demo/demo.h b/libsigrok4DSL/hardware/demo/demo.h
index 1482d700..8a2b84be 100644
--- a/libsigrok4DSL/hardware/demo/demo.h
+++ b/libsigrok4DSL/hardware/demo/demo.h
@@ -31,9 +31,9 @@ enum DEMO_PATTERN {
     PATTERN_DEFAULT = 1,
 };
 
-static char *pattern_strings_logic[100]  = {"RANDOM"};
-static char *pattern_strings_dso[100] = {"RANDOM"};
-static char *pattern_strings_analog[100] = {"RANDOM"};
+static char *pattern_strings_logic[100]  = {"random"};
+static char *pattern_strings_dso[100] = {"random"};
+static char *pattern_strings_analog[100] = {"random"};
 static int pattern_logic_count = 1;
 static int pattern_dso_count= 1;
 static int pattern_analog_count= 1;