Index: configure
===================================================================
--- configure   (revision 16409)
+++ configure   (working copy)
@@ -2654,6 +2654,9 @@
 has_library libqt-mt ||
     die "ERROR! You must have a threaded Qt installed to compile MythTV."

+has_library Xxf86vm
+    die "ERROR! You must have X11 XFree86 video mode extension library (Xxf86vm) installed to compile MythTV."
+
 #has_library libmysqlclient || has_library mysql/libmysqlclient ||
 #    die "ERROR! You must have a MySQL library installed to run MythTV."
 #