From b2d401cddb76f903c1cea22345f5f91e69fdde9c Mon Sep 17 00:00:00 2001
From: Xaver Hugl <xaver.hugl@gmail.com>
Date: Sun, 16 Jan 2022 16:55:56 +0100
Subject: [PATCH] backends/drm: re-add KWIN_FORCE_SW_CURSOR

It was accidentally dropped
---
 src/backends/drm/drm_output.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/backends/drm/drm_output.cpp b/src/backends/drm/drm_output.cpp
index 03b173d7f9..8b31c807f4 100644
--- a/src/backends/drm/drm_output.cpp
+++ b/src/backends/drm/drm_output.cpp
@@ -92,6 +92,12 @@ static bool isCursorSpriteCompatible(const QImage *buffer, const QImage *sprite)
 
 void DrmOutput::updateCursor()
 {
+    static bool valid;
+    static const bool forceSoftwareCursor = qEnvironmentVariableIntValue("KWIN_FORCE_SW_CURSOR", &valid) == 1 && valid;
+    if (forceSoftwareCursor) {
+        m_setCursorSuccessful = false;
+        return;
+    }
     if (!m_pipeline->pending.crtc) {
         return;
     }