diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index d5a7ea4..6f115c7 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -276,8 +276,8 @@ int hg_scanner_300::discard_all_images(void)
 				std::lock_guard<std::mutex>      lock(io_lock_);
 				ret = io_->read_bulk(&str[0], &block);
 			}
-			this_thread::sleep_for(chrono::milliseconds(100));
-			if (cnt > 5)
+			this_thread::sleep_for(chrono::milliseconds(1000));
+			if (cnt > 10)
 			{
 				break;
 			}
@@ -298,7 +298,7 @@ int hg_scanner_300::start(void)
 		return SCANNER_ERR_DEVICE_DEVS_BOOTING;
 	}
 
-	discard_all_images();
+	//discard_all_images();
 	bool	handled = false;
 	int		ret = try_third_app_handle_start(handled),
 			count = -1, 
@@ -716,7 +716,7 @@ int hg_scanner_300::initdevice()
 			break;
 		}
 		this_thread::sleep_for(chrono::milliseconds(800));
-		set_kernelsnap_ver();
+		//set_kernelsnap_ver();
 	}
 
 	set_kernelsnap_ver();