--- pci/cmipci.c.old	2006-12-07 17:07:25.000000000 +0300
+++ pci/cmipci.c	2006-12-20 18:18:01.000000000 +0300
@@ -2198,7 +2198,8 @@ static int _snd_cmipci_uswitch_put(struc
 		val = inb(cm->iobase + args->reg);
 	else
 		val = snd_cmipci_read(cm, args->reg);
-	change = (val & args->mask) != (ucontrol->value.integer.value[0] ? args->mask : 0);
+	change = (val & args->mask) != (ucontrol->value.integer.value[0] ? 
+			args->mask_on : (args->mask & ~args->mask_on));
 	if (change) {
 		val &= ~args->mask;
 		if (ucontrol->value.integer.value[0])