This makes the constant redrawing of the entire window go away, with no obvious ill effects. I still see some full-window redraws while interacting with the popover that should not be necessary, but the main problem is fixed with this.


diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index f5cf1ba..a2be09d 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -7655,6 +7655,9 @@ gtk_window_configure_event (GtkWidget         *widget,
   if (!_gtk_widget_is_toplevel (widget))
     return FALSE;
 
+  if (_gtk_widget_get_window (widget) != event->window)
+    return TRUE;
+
   /* If this is a gratuitous ConfigureNotify that's already
    * the same as our allocation, then we can fizzle it out.
    * This is the case for dragging windows around.