> > > But you read signal with other info, so if a radio program check for > > stereo receiving with a polling you change frequency, making > > noise... > > No, just do it when the radio card should change frequency. You get a > static value for signal strength. When the station disapears > afterwards the driver would still report a signal. This value would > just get updates on frequency change... > Could work (you have also to take in account that program change frequency during scanning very frequently, so you have to cache a range of frequency...) But another problem can raise... in this mode my process must keep in kernel quite a lot... I don't stop computer for a while? Also my program freeze... freddy77