diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 29c6544..0b40386 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -366,12 +366,12 @@ void hg_scanner::thread_read_int(void)
 	while (run_)
 	{
 		wait_read_int.wait();
-		if (is_read_int && is_firstopen_)
+		if (is_read_int && is_firstopen_ && pid_ == 0x300)
 		{
 			is_read_int = true;
 			notify_ui_working_status(STATU_DESC_SCANNER_ERR_DEVICE_DEVS_BOOTING, SANE_EVENT_STATUS, status_);
-			discard_all_images();
-			//set_updata0303();
+			//discard_all_images();
+			set_updata0303();
 			notify_ui_working_status(STATU_DESC_SCANNER_ERR_DEVICE_DEVS_START_SUCCES, SANE_EVENT_STATUS, status_);
 		}
 		if (is_firstopen_)
@@ -4095,7 +4095,7 @@ int hg_scanner::set_auto_flat(int data)
 }
 int hg_scanner::set_updata0303(void)
 {
-	return 0;
+	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
 }
 int hg_scanner::set_device_model(string sts)
 {
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 8329887..3f1c5f0 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -707,7 +707,7 @@ int hg_scanner_239::discard_all_images(void)
 				std::lock_guard<std::mutex>      lock(io_lock_);
 				ret = io_->read_interrupt(buf, &size);
 			}
-			while (ret == SCANNER_ERR_OK)
+			while (ret == SCANNER_ERR_OK && size)
 			{
 				pre_int++;
 				if (info->From == setting3399::IMG)
@@ -1323,11 +1323,11 @@ int hg_scanner_239::start(void)
 	if (handled)
 		return ret;
 
-	if (is_read_int)
-	{
-		VLOG_MINI_1(LOG_LEVEL_WARNING, "device  status is(%s)\n", STATU_DESC_SCANNER_ERR_DEVICE_DEVS_BOOTING);
-		return SCANNER_ERR_DEVICE_DEVS_BOOTING;
-	}
+	//if (is_read_int)
+	//{
+	//	VLOG_MINI_1(LOG_LEVEL_WARNING, "device  status is(%s)\n", STATU_DESC_SCANNER_ERR_DEVICE_DEVS_BOOTING);
+	//	return SCANNER_ERR_DEVICE_DEVS_BOOTING;
+	//}
 
 	user_cancel_ = false;
 	ret = on_is_auto_paper(is_auto_paper_scan);
diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index aa9f171..73a3711 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -91,7 +91,7 @@ hg_scanner_300::hg_scanner_300(const char* dev_name,int pid, usb_io* io) : hg_sc
 		else
 			init_settings((jsontext3 + jsontext4 + jsontext5).c_str());
 	}
-	//initdevice();
+	initdevice();
 	wait_read_int.notify();
 }
 hg_scanner_300::~hg_scanner_300()
diff --git a/hgdriver/hgdev/hg_scanner_302.cpp b/hgdriver/hgdev/hg_scanner_302.cpp
index 5b8d9cd..f7a00c5 100644
--- a/hgdriver/hgdev/hg_scanner_302.cpp
+++ b/hgdriver/hgdev/hg_scanner_302.cpp
@@ -636,7 +636,7 @@ int hg_scanner_302::discard_all_images(void)
 		io_->set_timeout(100);
 		ret = io_->read_interrupt(buf, &size);
 	}
-	while (ret == SCANNER_ERR_OK)
+	while (ret == SCANNER_ERR_OK && size)
 	{
 		pre_int++;
 		if (info->From == setting3399::IMG)