M src/platform/qt/DisplayGL.cpp → src/platform/qt/DisplayGL.cpp

@@ -114,7 +114,9 @@ }
 }
 
 void DisplayGL::framePosted(const uint32_t* buffer) {
-	m_painter->setBacking(buffer);
+	if (buffer) {
+		m_painter->setBacking(buffer);
+	}
 }
 
 void DisplayGL::resizeEvent(QResizeEvent* event) {

M src/platform/qt/GameController.cpp → src/platform/qt/GameController.cpp

@@ -118,7 +118,11 @@ controller->m_pauseAfterFrame = false;
 			controller->gamePaused(&controller->m_threadContext);
 		}
 		controller->m_pauseMutex.unlock();
-		controller->frameAvailable(controller->m_drawContext);
+		if (GBASyncDrawingFrame(&controller->m_threadContext.sync)) {
+			controller->frameAvailable(controller->m_drawContext);
+		} else {
+			controller->frameAvailable(nullptr);
+		}
 	};
 
 	m_threadContext.logHandler = [] (GBAThread* context, enum GBALogLevel level, const char* format, va_list args) {