Gateway M520, no sound

I recently installed ubuntu 10.04 on a gateway M520S with a ICH4 southbridge AC97 audio card integrated into the motherboard. The default driver that is being used at the moment is "snd-intel8x0". I have no sound. I never did. I'm new to linux systems so I am having a hard time finding anything that can help. I found some trouble shooting guides and everything passed, but I still have no sound.
I had a similar problem with my wi-fi card, but for that I ended up re-installing the default driver and now that works, but when I tried to re-install the "snd-intel8x0" driver the terminal said it couldn't find the package. The command I used was "sudo apt-get install". (This worked for my wi-fi driver.) I don't know what else to do, please help.

-Ben
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AlsaVersion:
 Advanced Linux Sound Architecture Driver Version 1.0.25.
 Compiled on Feb 11 2012 for kernel 3.0.0-15-generic (SMP).
ApportVersion: 1.23-0ubuntu4
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: bcpostman2007 1453 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with Cx20468-31 at irq 17'
   Mixer name : 'Conexant Cx20468-31'
   Components : 'AC97a:43585430'
   Controls : 23
   Simple ctrls : 16
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
Package: alsa-driver (not installed)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Tags: oneiric running-unity
Uname: Linux 3.0.0-15-generic i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin audio cdrom dialout lpadmin plugdev pulse pulse-access sambashare video
dmi.bios.date: 07/19/2004
dmi.bios.vendor: AMI
dmi.bios.version: NOTE BIOS Version /52.00.12
dmi.board.name: Gateway M520
dmi.board.vendor: Gateway
dmi.board.version: KBC K52.00.06
dmi.chassis.type: 10
dmi.chassis.vendor: Gateway
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnAMI:bvrNOTEBIOSVersion/52.00.12:bd07/19/2004:svnGateway:pnGatewayM520:pvr52.00.12:rvnGateway:rnGatewayM520:rvrKBCK52.00.06:cvnGateway:ct10:cvrRev1.0:
dmi.product.name: Gateway M520
dmi.product.version: 52.00.12
dmi.sys.vendor: Gateway