diff --git a/plugins/platforms/x11/standalone/CMakeLists.txt b/plugins/platforms/x11/standalone/CMakeLists.txt
--- a/plugins/platforms/x11/standalone/CMakeLists.txt
+++ b/plugins/platforms/x11/standalone/CMakeLists.txt
@@ -20,7 +20,7 @@
 endif()
 
 add_library(KWinX11Platform MODULE ${X11PLATFORM_SOURCES})
-target_link_libraries(KWinX11Platform eglx11common kwin Qt5::X11Extras XCB::CURSOR)
+target_link_libraries(KWinX11Platform eglx11common kwin Qt5::X11Extras XCB::CURSOR KF5::Crash)
 if(X11_Xinput_FOUND)
     target_link_libraries(KWinX11Platform ${X11_Xinput_LIB})
 endif()
diff --git a/plugins/platforms/x11/standalone/x11_platform.cpp b/plugins/platforms/x11/standalone/x11_platform.cpp
--- a/plugins/platforms/x11/standalone/x11_platform.cpp
+++ b/plugins/platforms/x11/standalone/x11_platform.cpp
@@ -43,6 +43,7 @@
 
 #include <KConfigGroup>
 #include <KLocalizedString>
+#include <KCrash>
 
 #include <QThread>
 #include <QOpenGLContext>
@@ -236,13 +237,15 @@
             m_openGLFreezeProtection->setInterval(15000);
             m_openGLFreezeProtection->setSingleShot(true);
             m_openGLFreezeProtection->start();
+            const QString configName = kwinApp()->config()->name();
             m_openGLFreezeProtection->moveToThread(m_openGLFreezeProtectionThread);
             connect(m_openGLFreezeProtection, &QTimer::timeout, m_openGLFreezeProtection,
-                [] {
+                [configName] {
                     const QString unsafeKey(QLatin1String("OpenGLIsUnsafe") + (kwinApp()->isX11MultiHead() ? QString::number(kwinApp()->x11ScreenNumber()) : QString()));
-                    auto group = KConfigGroup(kwinApp()->config(), "Compositing");
+                    auto group = KConfigGroup(KSharedConfig::openConfig(configName), "Compositing");
                     group.writeEntry(unsafeKey, true);
                     group.sync();
+                    KCrash::setDrKonqiEnabled(false);
                     qFatal("Freeze in OpenGL initialization detected");
                 }, Qt::DirectConnection);
         } else {