Index: gnome-shell-3.20.1/js/ui/endSessionDialog.js
===================================================================
--- gnome-shell-3.20.1.orig/js/ui/endSessionDialog.js
+++ gnome-shell-3.20.1/js/ui/endSessionDialog.js
@@ -403,8 +403,10 @@ const EndSessionDialog = new Lang.Class(
 
         let description;
         let displayTime = _roundSecondsToInterval(this._totalSecondsToStayOpen,
-                                                  this._secondsLeft,
-                                                  10);
+                                                          this._secondsLeft,
+                                                          // larger than any normal value
+                                                          1000000);
+
 
         if (this._user.is_loaded) {
             let realName = this._user.get_real_name();