Hi, I am trying to troubleshoot a sound problem on my Dell XPS M1210 running SigmaTel High Definition Audio CODEC. The sound works properly until you try to switch it to a Bluetooth Stereo headset. Everything seems to work on the Bluetooth side but the XPS speakers do not mute and there is no sound from the headset. I see traffic on other forums about installing the SigmaTel driver for the motherboard instead of the Dell one. Would these be the same? Is it worth a try? Thanks Keith