No sound! How to make it to default drivers

[Jwalant Natvarlal Soneji]

Hi All,
My Fedora 10 sound functionality was working very fine.
Then also, I tried to install the AC97 drivers, and now the sound has gone.

Please suggest how to rollback to the original situation.
All, pulseaudio systems have been installed.

Thanks,
Jwalant Natvarlal Soneji, BE IT, India
Pune, MH, India
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