as I know RH9.0 uses 2.4.20 kernel, but I think it doesn't support AC97 module by default, but you can check this:
modprobe i810_audio
if everything is ok, it means, you have to put 'modprobe i810_audio' somewhere startup with system( I don't where it is in RH)
else {
make dep;
make clean;
make bzImage;
make modules;
make modules_install;
}
I mean you can recompile kernel;
I have AC97 sound I have recompiled kernel and now everything works fine
