I purchased a Vostro 1500 with Vista and added XP Pro in a dual boot configuration. Everything works well except I have not been able to get the Sigma sound card to work. I have downloaded the appropriate driver (R158235) according to the Dell website, installed it and still no sound device detected by XP.
"When I go to Device Manager, I see under Sound, video and game controllers everything looks good except SigmaTel High Definition Audio CODEC. There is a yellow circle with a black exclamation point in it, indicating some sort of conflict. Also under OTHER DEVICES is a conflict with Modem Device on High Definition Audio Bus. Also under OTHER DEVICES is 3 other conflicts called Base System Device.
I finally got this thing resolved. The trick, at least for me was removing the 3 Base System Device objects. Those ended up being the Ricoh Chipset drivers.
Once I removed those, I ran the install for the Audio. Please note that I did not reboot after installing the 3 Base System Device objects and the install of the audio driver. Only after the audio driver completed did I reboot. After the reboot I was able to then install the drivers for the Ricoh chipset devices."
I finally followed your directions and my sigmatel audio drivers finally installed. I had to get rid of the pci audio device in the device manager before the driver would install correctly. Thanks very much for your help.