When I plug headphones into the audio out jack of my Thinkpad T41 laptop, the speakers turn off automatically. That's fine. But when I dock the laptop and plug headphones into the audio out jack of the docking station, the laptop speakers do not shut off - and that's a problem. Does anyone know how I can get the laptop speakers to go off automatically when I plug headphones into the docking station audio out jack? I'm running XP/SP2 and the docking station is an IBM Type 2878, part number 62P4551.
Thanks for any help,