From e4156bad6398dcbe8740041148d95ee9ed437d8b Mon Sep 17 00:00:00 2001
From: David Redondo <qt@david-redondo.de>
Date: Wed, 31 Jan 2024 09:01:48 +0100
Subject: [PATCH] client: Disable threaded GL on desktop NVIDIA

Otherwise QtQuick windows freeze when resized.
In order to still use threaded rendering on
embedded platforms where resizing is not required
we check if XDG_CURRENT_DESKTOP which should be
set by  desktop environments.

Task-number: QTBUG-95817
Pick-to: 6.6.2
Change-Id: Ic2348c3169e0ade8c5463e3d7c7a1c45037a89a7
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Reviewed-by: David Edmundson <davidedmundson@kde.org>
(cherry picked from commit 6d83cf94b568fa9e591761a182cf84e3959fbf32)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 38348ce5b06624cb6e36f814ebdfbc3ec61f1691)
Reviewed-by: David Redondo <qt@david-redondo.de>
---

diff --git a/src/hardwareintegration/client/wayland-egl/qwaylandeglclientbufferintegration.cpp b/src/hardwareintegration/client/wayland-egl/qwaylandeglclientbufferintegration.cpp
index cc7ee90..3b97aef 100644
--- a/src/hardwareintegration/client/wayland-egl/qwaylandeglclientbufferintegration.cpp
+++ b/src/hardwareintegration/client/wayland-egl/qwaylandeglclientbufferintegration.cpp
@@ -92,6 +92,13 @@
             break;
         }
     }
+
+    // On desktop NVIDIA resizing QtQuick freezes them when using threaded rendering QTBUG-95817
+    // In order to support threaded rendering on embedded platforms where resizing is not needed
+    // we check if XDG_CURRENT_DESKTOP is set which desktop environments should set
+    if (qstrcmp(vendor, "NVIDIA") == 0 && qEnvironmentVariableIsSet("XDG_CURRENT_DESKTOP")) {
+        m_supportsThreading = false;
+    }
 }
 
 bool QWaylandEglClientBufferIntegration::isValid() const