$more patch.diff 
diff -r 3d771c1f9625 linux/drivers/media/video/cx88/cx88-cards.c
--- a/linux/drivers/media/video/cx88/cx88-cards.c       Tue May 08 01:55:06 2007 +0200
+++ b/linux/drivers/media/video/cx88/cx88-cards.c       Tue May 08 15:35:43 2007 +0300
@@ -1345,10 +1345,17 @@ struct cx88_board cx88_boards[] = {
                .input          = {{
                        .type   = CX88_VMUX_TELEVISION,
                        .vmux   = 0,
-               },{
-                       .type   = CX88_VMUX_COMPOSITE1,
-                       .vmux   = 1,
-                       .gpio0  = 0xff02,
+                       .gpio0  = 0x0400, /* pin 2:mute = 0 (off?) */
+                       .gpio1  = 0x0000,
+                       .gpio2  = 0x0800, /* pin 19:audio = 0 (tv) */
+               
+               },{
+                       .type   = CX88_VMUX_COMPOSITE1,
+                       .vmux   = 1,
+                       .gpio0  = 0x0400, /* probably?  or 0x0404 to turn mute on */
+                       .gpio1  = 0x0000,
+                       .gpio2  = 0x0808, /* pin 19:audio = 1 (line) */
+                                       
                },{
                        .type   = CX88_VMUX_SVIDEO,
                        .vmux   = 2,