diff -u -r rockbox-3.1/firmware/drivers/button.c rockbox-3.1-buttonlight/firmware/drivers/button.c
--- rockbox-3.1/firmware/drivers/button.c	2008-12-23 23:00:53.000000000 +0100
+++ rockbox-3.1-buttonlight/firmware/drivers/button.c	2009-02-01 19:16:37.000000000 +0100
@@ -145,6 +145,9 @@
     diff = btn ^ lastbtn;
     if(diff && (btn & diff) == 0)
     {
+#ifdef HAVE_BUTTON_LIGHT
+	buttonlight_on();
+#endif
 #ifdef HAVE_BACKLIGHT
 #ifdef HAVE_REMOTE_LCD
         if(diff & BUTTON_REMOTE)
@@ -166,6 +169,10 @@
     {
         if ( btn )
         {
+#ifdef HAVE_BUTTON_LIGHT
+	    if (btn == BUTTON_SELECT)
+		buttonlight_off();
+#endif
             /* normal keypress */
             if ( btn != lastbtn )
             {