From ebe6f58d9aaeee87e8143b76a9fcb3a50e42ca94 Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Thu, 16 May 2024 15:38:33 +0300
Subject: [PATCH] backends/wayland: Avoid attaching null buffer

Otherwise the window will be unmapped.
---
 src/backends/wayland/wayland_egl_backend.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/backends/wayland/wayland_egl_backend.cpp b/src/backends/wayland/wayland_egl_backend.cpp
index 13f1023e6b..ba910c7117 100644
--- a/src/backends/wayland/wayland_egl_backend.cpp
+++ b/src/backends/wayland/wayland_egl_backend.cpp
@@ -129,11 +129,13 @@ void WaylandEglPrimaryLayer::present()
 {
     const auto waylandOutput = static_cast<WaylandOutput *>(m_output);
     KWayland::Client::Surface *surface = waylandOutput->surface();
-    surface->attachBuffer(m_presentationBuffer);
-    surface->damage(m_damageJournal.lastDamage());
-    surface->setScale(std::ceil(waylandOutput->scale()));
+    if (m_presentationBuffer) {
+        surface->attachBuffer(m_presentationBuffer);
+        surface->damage(m_damageJournal.lastDamage());
+        surface->setScale(std::ceil(waylandOutput->scale()));
+        m_presentationBuffer = nullptr;
+    }
     surface->commit();
-    m_presentationBuffer = nullptr;
 }
 
 DrmDevice *WaylandEglPrimaryLayer::scanoutDevice() const