Matrix Talk:Module-hda-intel

I have this on my Acer Aspire 8730G computer :

            description: Audio device
            product: 82801I (ICH9 Family) HD Audio Controller
            vendor: Intel Corporation
            physical id: 1b
            bus info: pci@0000:00:1b.0
            version: 03
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi pciexpress bus_master cap_list
            configuration: driver=HDA Intel latency=0 module=snd_hda_intel

There is no sound... Help ! :o)