nvidia mcp51 internal sound card not detected

[orangepeel]

ubuntu 14 not detecting sound card - i know the hardware works from previous os.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2
Uname: Linux 3.19.0-25-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: Unity
Date: Thu Oct 29 19:55:29 2015
InstallationDate: Installed on 2015-10-29 (0 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/04/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.1.9
dmi.board.name: 0YP696
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.1.9:bd12/04/2008:svnDellInc.:pnOptiPlex740Enhanced:pvr:rvnDellInc.:rn0YP696:rvrA02:cvnDellInc.:ct3:cvr:
dmi.product.name: OptiPlex 740 Enhanced
dmi.sys.vendor: Dell Inc.