on board ac97 sound not work in 2.4.20

[eric lin <fsshl@centurytel.net>]

after I login gnome as end user, it give me 2 error window

I was not able to open your audio device
OPlease check that you have permission to open /dev/mixer
and make sure you have sound support compiled to your kernel

so I me chmod 777 /dev/mixer, reboot
login from gdm to gnome as enduser, no sound, that  I had have in 2.4.17 
in Asus Via chip of K7 1.4GHz (I am using Intel  board onbard AC97)

please help
sincere Eric
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