From 355e305c1686968467269e8dafbda9b896315d12 Mon Sep 17 00:00:00 2001
From: "Owen W. Taylor" <otaylor@fishsoup.net>
Date: Wed, 3 Oct 2012 20:13:42 -0400
Subject: [PATCH] Freeze the update counter for unmapped windows

When a window is unmapped, freeze its frame clock. This avoids doing
unnecessary work, but also means that we won't block waiting for
_NET_WM_FRAME_DRAWN messages that will never be received since the
frame ended while the window was withdrawn.

https://bugzilla.gnome.org/show_bug.cgi?id=685460
---
 gdk/x11/gdkdisplay-x11.c | 6 ++++++
 gdk/x11/gdkwindow-x11.c  | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/gdk/x11/gdkdisplay-x11.c b/gdk/x11/gdkdisplay-x11.c
index 5afb11c417..4e28f74ec0 100644
--- a/gdk/x11/gdkdisplay-x11.c
+++ b/gdk/x11/gdkdisplay-x11.c
@@ -688,6 +688,9 @@ gdk_x11_display_translate_event (GdkEventTranslator *translator,
               gdk_frame_clock_thaw (gdk_window_get_frame_clock (event->any.window));
             }
 
+	  if (toplevel)
+            gdk_window_freeze_toplevel_updates_libgtk_only (window);
+
           _gdk_x11_window_grab_check_unmap (window, xevent->xany.serial);
         }
 
@@ -708,6 +711,9 @@ gdk_x11_display_translate_event (GdkEventTranslator *translator,
 	    gdk_synthesize_window_state (window,
 					 GDK_WINDOW_STATE_ICONIFIED,
 					 0);
+
+	  if (toplevel)
+	    gdk_window_thaw_toplevel_updates_libgtk_only (window);
 	}
 
       break;
diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index 99d2f7f659..f6af492277 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -940,6 +940,9 @@ _gdk_x11_display_create_window_impl (GdkDisplay    *display,
                     G_CALLBACK (on_frame_clock_before_paint), window);
   g_signal_connect (clock, "after-paint",
                     G_CALLBACK (on_frame_clock_after_paint), window);
+
+  if (GDK_WINDOW_TYPE (window) != GDK_WINDOW_CHILD)
+    gdk_window_freeze_toplevel_updates_libgtk_only (window);
 }
 
 static GdkEventMask