Fedora Core 4 installed on Intel Mother board with chipset D915GVWB. system recognised the sound card :
model: 82801FB/FBM/FR/FW/FRW(ICH6 Family) High Definition Audio Controller
but when i tried to play test sound ( wav file ) no sound is audible. Hardware has been tested in windows environment and pclinux os environment, both the cased it was found working. pc linux os is also showing same hardware details and sound is coming. It is failing in Fedora core 4.