From 83347282eb88286aa9224dfebf6250c4e8b54817 Mon Sep 17 00:00:00 2001
From: Matt McClaskey <matthew.mcclaskey@gmail.com>
Date: Fri, 9 Feb 2024 10:46:50 -0500
Subject: [PATCH] KASM-5609 fixed artifacts after screen movements (#99)

Co-authored-by: mattmcclaskey <matt@kasmweb.com>
---
 core/rfb.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/rfb.js b/core/rfb.js
index ed2719ee..12a99583 100644
--- a/core/rfb.js
+++ b/core/rfb.js
@@ -175,6 +175,7 @@ export default class RFB extends EventTargetMixin {
         this._disconnTimer = null;      // disconnection timer
         this._resizeTimeout = null;     // resize rate limiting
         this._mouseMoveTimer = null;
+        this._forceFullFrameUpdateTimeout = null;
 
         // Decoder states
         this._decoders = {};
@@ -4141,6 +4142,14 @@ export default class RFB extends EventTargetMixin {
             this._resize(this._FBU.width, this._FBU.height);
         }
 
+        // There are certain conditions with multi-monitor that warrent forcing a full frame update after a delay
+        if (this._display.screens.length > 1) {
+            clearTimeout(this._forceFullFrameUpdateTimeout);
+            this._forceFullFrameUpdateTimeout = setTimeout(function(){
+                RFB.messages.fbUpdateRequest(this._sock, false, 0, 0, this._fbWidth, this._fbHeight)
+            }.bind(this), 500);
+        }
+
         return true;
     }