diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 238cd6c..890107c 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -1653,7 +1653,7 @@ int hg_scanner_239::get_sleep_time(int& getime)
 		getime = val;
 		save_sleeptime_type_ = true;
 	}
-	VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "get_sleep_time %d= %s\n", val,hg_scanner_err_name(ret));
+	VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "get_sleep_time = %d with %s\n", val,hg_scanner_err_name(ret));
 	return ret;
 }
 
diff --git a/hgsane/sane_hg_mdw.cpp b/hgsane/sane_hg_mdw.cpp
index 3db50c6..1353359 100644
--- a/hgsane/sane_hg_mdw.cpp
+++ b/hgsane/sane_hg_mdw.cpp
@@ -1143,7 +1143,7 @@ bool hg_sane_middleware::get_current_value(scanner_handle handle, int option, vo
 
 	return ret;
 }
-void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, int* bytes)
+void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, int* bytes, bool log)
 {
 	std::string val(get_option_json(handle, option));
 	void* data = nullptr;
@@ -1163,7 +1163,10 @@ void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, i
 			memcpy(data, &v, sizeof(v));
 			if (bytes)
 				*bytes = sizeof(SANE_Bool);
-			VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %s\n", option, title.c_str(), v ? "true" : "false");
+			if (log)
+			{
+				VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %s\n", option, title.c_str(), v ? "true" : "false");
+			}
 		}
 		else if (val == "int")
 		{
@@ -1174,7 +1177,10 @@ void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, i
 			memcpy(data, &v, sizeof(v));
 			if (bytes)
 				*bytes = sizeof(v);
-			VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %d\n", option, title.c_str(), v);
+			if (log)
+			{
+				VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %d\n", option, title.c_str(), v);
+			}
 		}
 		else if (val == "float")
 		{
@@ -1187,7 +1193,10 @@ void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, i
 				*bytes = sizeof(sd);
 
 			memcpy(data, &sd, sizeof(sd));
-			VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %f\n", option, title.c_str(), v);
+			if (log)
+			{
+				VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %f\n", option, title.c_str(), v);
+			}
 		}
 		else if (val == "string")
 		{
@@ -1203,7 +1212,10 @@ void* hg_sane_middleware::get_default_value(scanner_handle handle, int option, i
 			strcpy((char*)data, val.c_str());
 			if (bytes)
 				*bytes = val.length();
-			VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %s\n", option, title.c_str(), (char*)data);
+			if (log)
+			{
+				VLOG_MINI_3(LOG_LEVEL_DEBUG_INFO, "option %d(%s) default value is: %s\n", option, title.c_str(), (char*)data);
+			}
 		}
 		else
 		{
@@ -1562,14 +1574,14 @@ bool hg_sane_middleware::get_cur_value(SANE_Handle handle, int option, void* val
 
 	return get_current_value(h, option, value, type);
 }
-void* hg_sane_middleware::get_def_value(SANE_Handle handle, int option, int* bytes)
+void* hg_sane_middleware::get_def_value(SANE_Handle handle, int option, int* bytes, bool log)
 {
 	scanner_handle	h = find_openning_device(handle);
 
 	if (!h)
 		return NULL;
 
-	return get_default_value(h, option, bytes);
+	return get_default_value(h, option, bytes, log);
 }
 SANE_Status hg_sane_middleware::io_control(SANE_Handle h, unsigned long code, void* data, unsigned* len)
 {
diff --git a/hgsane/sane_hg_mdw.h b/hgsane/sane_hg_mdw.h
index 99f586c..1cebd70 100644
--- a/hgsane/sane_hg_mdw.h
+++ b/hgsane/sane_hg_mdw.h
@@ -83,7 +83,7 @@ class hg_sane_middleware
 
 	void reload_current_value(scanner_handle handle, std::vector<std::string>* changed = NULL);
 	bool get_current_value(scanner_handle handle, int option, void* value, SANE_Value_Type* type = NULL);
-	void* get_default_value(scanner_handle handle, int option, int* bytes = nullptr);	// caller should call local_utility::free_memory to free the returned value
+	void* get_default_value(scanner_handle handle, int option, int* bytes = nullptr, bool log = false);	// caller should call local_utility::free_memory to free the returned value
 
 /// <summary>
 /// 关联项处理
@@ -189,7 +189,7 @@ public:
 	SANE_Option_Descriptor* get_option_descriptor(SANE_Handle h, SANE_Int option);
 	SANE_Status set_option(SANE_Handle h, SANE_Int option, SANE_Action action, void* value, SANE_Int* after_do);
 	bool get_cur_value(SANE_Handle handle, int option, void* value, SANE_Value_Type* type = NULL);	// SANE_type
-	void* get_def_value(SANE_Handle handle, int option, int* bytes = nullptr);	// caller should call local_utility::free_memory to free the returned value, SANE_type
+	void* get_def_value(SANE_Handle handle, int option, int* bytes = nullptr, bool log = false);	// caller should call local_utility::free_memory to free the returned value, SANE_type
 
 	// extension ...
 	SANE_Status io_control(SANE_Handle h, unsigned long code, void* data, unsigned* len);