diff --git a/src/i830_lvds.c b/src/i830_lvds.c
index c6002eb..3cd4da8 100644
--- a/src/i830_lvds.c
+++ b/src/i830_lvds.c
@@ -923,7 +923,8 @@ i830_lvds_get_modes(xf86OutputPtr output)
 	    edid_mon->det_mon[0].section.ranges.max_v = 200;
 	    edid_mon->det_mon[0].section.ranges.min_h = 0;
 	    edid_mon->det_mon[0].section.ranges.max_h = 200;
-	    
+            /*defaultly we think laptop should support continuous-frequncy*/
+            edid_mon->features.msc = 0x01;  
 	    output->MonInfo = edid_mon;
 	}
     }