From 54c6b5d7dcb44bbb6912c74ec77213836307d021 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 1 Mar 2019 15:20:50 +0100
Subject: Make auto-center smarter (hopefully)

---
 src/xx.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/xx.cpp b/src/xx.cpp
index 8be1d96..0b91161 100644
--- a/src/xx.cpp
+++ b/src/xx.cpp
@@ -3,6 +3,7 @@
 #include "cvt.h"
 #include <QDebug>
 #include <QSocketNotifier>
+#include <QThread>
 
 /*
  * This clusterfuck exists because there are name clashes between X11/Xrandr headers
@@ -453,6 +454,30 @@ ConfigBackup ScreenSetup::setCenteredClone()
 			break;
 		}
 	}
+	// See if we even need to do anything
+	for (int i = 0; i < 2; ++i) {
+		int withPref = 0;
+		QSet<RRMode> known;
+		for (auto oi : a->_outputMap) {
+			if (oi->output->npreferred == 0) {
+				if (oi->mode != nullptr) {
+					known.insert(oi->mode->id);
+				}
+			} else {
+				withPref++;
+				known.insert(oi->output->modes[0]);
+			}
+		}
+		if (withPref == 0 && i == 0) {
+			QThread::msleep(100);
+			updateScreenResources();
+			retval = createCrtcBackup();
+			continue;
+		}
+		if (known.count() < 2)
+			return retval;
+		break;
+	}
 	XGrabServer(a->_display);
 	a->disconnectAllCrtcs();
     QSize screenSize;
-- 
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