--- a/xorg.rst	Tue Jun 30 20:47:18 2009 +0300
+++ b/xorg.rst	Tue Jun 30 20:54:20 2009 +0300
@@ -23,6 +23,14 @@
 
 Time measure in minute.
 
+To enable this configuration you must set "DPMS" option in "Monitor" section:
+
+  Section "Monitor"
+...
+      Option "DPMS"
+...
+  EndSection
+
 * Set display dimensions.
 
 To see currect settings type: