commit 6bc4fcd282c2197335d3574a25f234fb44e12fd3
Author: Tom Hughes <tom@compton.nu>
Date:   Mon Jan 26 20:50:03 2015 +0000

    Resume events when disconnecting from a frame clock
    
    If we are disconnecting from a frame clock that has paused event
    processing and hasn't issued a resume yet make sure we resume the
    events or they will stay blocked forever.

diff --git a/gdk/gdkinternals.h b/gdk/gdkinternals.h
index cbb87e4..d1d1e4d 100644
--- a/gdk/gdkinternals.h
+++ b/gdk/gdkinternals.h
@@ -333,6 +333,7 @@ struct _GdkWindow
   guint in_update : 1;
   guint geometry_dirty : 1;
   guint event_compression : 1;
+  guint frame_clock_events_paused : 1;
 
   /* The GdkWindow that has the impl, ref:ed if another window.
    * This ref is required to keep the wrapper of the impl window alive
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 6960cae..56e4d02 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -10914,6 +10914,8 @@ gdk_window_flush_events (GdkFrameClock *clock,
   _gdk_display_pause_events (display);
 
   gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_RESUME_EVENTS);
+
+  window->frame_clock_events_paused = TRUE;
 }
 
 static void
@@ -10940,6 +10942,8 @@ gdk_window_resume_events (GdkFrameClock *clock,
 
   display = gdk_window_get_display (window);
   _gdk_display_unpause_events (display);
+
+  window->frame_clock_events_paused = TRUE;
 }
 
 static void
@@ -10972,6 +10976,11 @@ gdk_window_set_frame_clock (GdkWindow     *window,
 
   if (window->frame_clock)
     {
+      if (window->frame_clock_events_paused)
+        {
+          gdk_window_resume_events (window->frame_clock, G_OBJECT (window));
+        }
+
       g_signal_handlers_disconnect_by_func (G_OBJECT (window->frame_clock),
                                             G_CALLBACK (gdk_window_flush_events),
                                             window);
