[Dell Inspiron M4110] HDMI audio doesn't work

cid:201107-8317
that's no audio from HDMI, but video ok
HDMI audio device isn't showed in the interface of sound's output setting

The same issue occurs in System Quantal

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-29-generic 3.2.0-29.46
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: Generic_1 [HD-Audio Generic], device 0: ALC269VB Analog [ALC269VB Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ubuntu 1599 F.... pulseaudio
 /dev/snd/controlC0: ubuntu 1599 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Card0.Amixer.info:
 Card hw:0 'Generic'/'HD-Audio Generic at 0xa0344000 irq 52'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 6
   Simple ctrls : 1
Card0.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Card1.Amixer.info:
 Card hw:1 'Generic_1'/'HD-Audio Generic at 0xa0340000 irq 16'
   Mixer name : 'Realtek ALC269VB'
   Components : 'HDA:10ec0269,102804c3,00100100'
   Controls : 18
   Simple ctrls : 10
Date: Mon Oct 29 04:14:22 2012
HibernationDevice: RESUME=UUID=7cf2dba5-3ce7-4345-8773-ac7bd6078a79
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Dell Inc. Dell System Inspiron M4110
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 0 radeondrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic root=UUID=afb7b1c7-6d63-45d4-852d-b32a2971ba5c ro quiet splash initcall_debug vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-29-generic N/A
 linux-backports-modules-3.2.0-29-generic N/A
 linux-firmware 1.79
RfKill:
 0: dell-wifi: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/22/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: X19
dmi.board.asset.tag: Base Board Asset Tag Unknown
dmi.board.name: Q4E3A3
dmi.board.vendor: Dell Inc.
dmi.board.version: A11
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrX19:bd07/22/2011:svnDellInc.:pnDellSystemInspironM4110:pvr:rvnDellInc.:rnQ4E3A3:rvrA11:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System Inspiron M4110
dmi.sys.vendor: Dell Inc.