diff --git a/lib/lv_drivers/display/monitor.c b/lib/lv_drivers/display/monitor.c
index fe0c0f27..67af9944 100644
--- a/lib/lv_drivers/display/monitor.c
+++ b/lib/lv_drivers/display/monitor.c
@@ -291,7 +291,9 @@ static void monitor_sdl_clean_up(void)
 void monitor_backlight(uint8_t level)
 {
     SDL_SetTextureColorMod(monitor.texture, level, level, level);
-    window_update(&monitor);
+    // window_update(&monitor);
+    monitor.sdl_refr_qry = true;
+    monitor_sdl_refr_core();
 }
 
 void monitor_title(const char* title)