Index: plugins/power/gsd-power-constants.h
===================================================================
--- plugins/power/gsd-power-constants.h.orig	2013-11-12 01:25:13.000000000 +0800
+++ plugins/power/gsd-power-constants.h	2014-03-27 11:39:34.100125030 +0800
@@ -18,7 +18,7 @@
  */
 
 /* The blank delay when the screensaver is active */
-#define SCREENSAVER_TIMEOUT_BLANK                       15 /* seconds */
+#define SCREENSAVER_TIMEOUT_BLANK                       300 /* seconds */
 
 /* The dim delay when dimming on idle is requested but idle-delay
  * is set to "Never" */