problem attemp solve no audio on intel sound card adi 1980 on benq joybook 7000

To solve the problem of audio is not working in my Joybook 7000 I tried to install the package "linux-backports-modules-alsa-2.6.31-16-generic-pae.
This returns an error of installation and can not remove.
the audio works fine with Ubuntu 9.04.
How can I fix?

ProblemType: Package
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: annex 1553 F.... pulseaudio
CRDA: Error: [Errno 2] Nessun file o directory
Card0.Amixer.info:
 Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with AD1980 at irq 6'
   Mixer name : 'Analog Devices AD1980'
   Components : 'AC97a:41445370'
   Controls : 46
   Simple ctrls : 32
Date: Sat Dec 12 14:04:11 2009
DistroRelease: Ubuntu 9.10
ErrorMessage:
 ErrorMessage: nessun pacchetto chiamato "linux-image-2.6.31-16-generic-pae" installato, impossibile eseguire la configurazione
HibernationDevice: RESUME=UUID=30b891a3-3f30-4d94-9fb2-5452e3f472ca
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release Candidate i386 (20091020)
LiveMediaBuild: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.2)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 002: ID 0e8d:0003 MediaTek Inc.
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: BENQ JoyBook 7000
Package: linux-image-2.6.31-16-generic-pae (not installed)
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-16-generic root=UUID=21df6355-04ff-4d8c-91ae-a0ef8a2e71bb ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-16-generic N/A
 linux-firmware 1.25
RfKill:

SourcePackage: linux
Title: package linux-image-2.6.31-16-generic-pae (not installed) failed to install/upgrade:
Uname: Linux 2.6.31-16-generic i686
dmi.bios.date: 02/23/2005
dmi.bios.vendor: Insyde Software Corporation
dmi.bios.version: Version 2.04
dmi.board.name: ODEM
dmi.board.vendor: BENQ
dmi.board.version: 0000
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: BENQ
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnInsydeSoftwareCorporation:bvrVersion2.04:bd02/23/2005:svnBENQ:pnJoyBook7000:pvrGRASSHOPPER2:rvnBENQ:rnODEM:rvr0000:cvnBENQ:ct10:cvrVersion1.0:
dmi.product.name: JoyBook 7000
dmi.product.version: GRASSHOPPER2
dmi.sys.vendor: BENQ