From c0da1ff5dca241afe0741cf4c6ed3b7ea0a7e9cc Mon Sep 17 00:00:00 2001
From: David Buezas <david.buezas@gmail.com>
Date: Sat, 13 Apr 2024 14:45:28 +0200
Subject: [PATCH] Don't send sleep command unless necessary

---
 Marlin/src/lcd/dogm/marlinui_DOGM.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
index a96d8e300287..06a234d04d09 100644
--- a/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
+++ b/Marlin/src/lcd/dogm/marlinui_DOGM.cpp
@@ -377,7 +377,13 @@ void MarlinUI::draw_kill_screen() {
 void MarlinUI::clear_lcd() { } // Automatically cleared by Picture Loop
 
 #if HAS_DISPLAY_SLEEP
-  void MarlinUI::sleep_display(const bool sleep/*=true*/) { sleep ? u8g.sleepOn() : u8g.sleepOff(); }
+  void MarlinUI::sleep_display(const bool sleep/*=true*/) { 
+    static bool asleep = false;
+    if (asleep != sleep){
+      sleep ? u8g.sleepOn() : u8g.sleepOff(); 
+      asleep = sleep;
+    }
+  }
 #endif
 
 #if HAS_LCD_BRIGHTNESS