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

@@ -86,6 +86,7 @@ controller->m_activeBuffer = &controller->m_buffers[0];
 			context->core->setVideoBuffer(context->core, reinterpret_cast<color_t*>(controller->m_activeBuffer->data()), controller->screenDimensions().width());
 		}
 
+		QMetaObject::invokeMethod(controller, "didReset");
 		controller->finishFrame();
 	};
 

M src/platform/qt/CoreController.h → src/platform/qt/CoreController.h

@@ -170,6 +170,7 @@ void stopping();
 	void crashed(const QString& errorMessage);
 	void failed();
 	void frameAvailable();
+	void didReset();
 	void stateLoaded();
 	void rewound();
 

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

@@ -108,6 +108,7 @@ #else
 	messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
 #endif
 	resizePainter();
+	connect(m_context.get(), &CoreController::didReset, this, &DisplayGL::resizeContext);
 }
 
 void DisplayGL::stopDrawing() {