> Do you have any insight into why this is happening? User was using > 2.4.20 and bttv driver version from this kernel. Thanks! No. Put bttv into debug mode (bttv_gpio=1, maybe also bttv_debug=1/2) and watch what happens. Maybe you also have to check what the audio modules (tvaudio or msp34xx) are doing. > My mute function, for reference: > > void videoinput_do_mute( videoinput_t *vidin, int mute ) > { [ ... ] Looks fine, beside from the fact that there is way to much cut+paste in that code block ... Gerd -- Weil die späten Diskussionen nicht mal mehr den Rotwein lohnen. -- Wacholder in "Melanie"