From 8e9512330d1c172c2819cdca23f80dc188166f19 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Mon, 11 Mar 2019 16:38:35 +0100
Subject: X11 platform: keep GUI scaling after screen is reconfigured

---
 src/Fl_x.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index 0d63218cd..a2225319c 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -1251,7 +1251,8 @@ static void react_to_screen_reconfiguration() {
     }
   }
   delete[] sizes;
-  if (nochange) { // screen sizes did not change: re-use previous screen scale values
+  if (nochange || (old_count == 1 && Fl::screen_count() == 1)) {
+    // screen sizes did not change or single screen: re-use previous screen scale values
     for (int screen = 0; screen < old_count; screen++)
       Fl::screen_driver()->scale(screen, scales[screen]);
   } else {
-- 
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