X not starting on Intel 845G

["H.A. Sujith" <randomzoo@spymac.com>]

I have debian 3.0r2 woody. I have an on board graphics controller Intel 
845G/L (Brookdale). X server is not starting on my computer. It gives 
the error "No devices detected". I have tried everything from Modifying 
the XF86Config-4 file to recompiling the kernel(with appropriate 
drivers) to re-installing the system with different boot options (bf24, 
vanilla etc.,) and none of them has worked. I've tried kernels 2.4.28-13 
and 2.4.20. Previously I was using Red Hat 8.0 and everything was fine, 
I was using kernels 2.4.18-14 and 2.4.20. It even worked on a Linux 
distribution based on Fedora core 2.
BTW, I am also not able to play MP3s using mpg123/mpg321. It says unable 
to open any libao drivers for device .(libao is installed). I have an on 
board sound card that came with the 845G chipset -- ICH(?).

Can someone (probably with the same hardware) give me step by step 
instructions on getting X and audio working.

Thanks for any help.