diff -r c25816e366bd -r 93cee0b9f619 Hardware/Mainboard/SuperIOHardware.cs
--- a/Hardware/Mainboard/SuperIOHardware.cs	Sat Nov 03 17:58:55 2012 +0000
+++ b/Hardware/Mainboard/SuperIOHardware.cs	Sun Nov 04 13:10:53 2012 +0000
@@ -1213,6 +1213,7 @@
             superIO.SetControl(index, (byte)(control.SoftwareValue * 2.55));
           sensor.Control = control;
           controls.Add(sensor);
+          ActivateSensor(sensor);
         }
       }
     }
@@ -1261,10 +1262,7 @@
 
       foreach (Sensor sensor in controls) {
         float? value = readControl(sensor.Index);
-        if (value.HasValue) {
-          sensor.Value = value;
-          ActivateSensor(sensor);
-        }
+        sensor.Value = value;                
       }
 
       postUpdate();