From a11681918aad2e6906790da7939db700488359fb Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Wed, 26 Oct 2022 19:20:32 +0200
Subject: [PATCH] OSD: Fix OSD::show from the non-main thread

If it's issued from a different thread, pass it to the main one so it's
eventually displayed.
Otherwise, it would just crash kwin.
---
 src/osd.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/osd.cpp b/src/osd.cpp
index 01d8331c95..da62eca0cd 100644
--- a/src/osd.cpp
+++ b/src/osd.cpp
@@ -11,6 +11,7 @@
 #include "workspace.h"
 
 #include <QQmlEngine>
+#include <QThread>
 
 namespace KWin
 {
@@ -37,6 +38,14 @@ void show(const QString &message, const QString &iconName, int timeout)
         // FIXME: only supported on Wayland
         return;
     }
+
+    if (QThread::currentThread() != qGuiApp->thread()) {
+        QTimer::singleShot(0, QCoreApplication::instance(), [message, iconName, timeout] {
+            show(message, iconName, timeout);
+        });
+        return;
+    }
+
     auto notification = osd();
     notification->setIconName(iconName);
     notification->setMessage(message);