Public bug reported:

Certifying 12.04.2 on this system. Plugged an HDMI monitor in that also
supports audio out. The audio output never appears in the sound-settings
tool so there is no way to get HDMI audio.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.5.0-23-generic 3.5.0-23.35~precise1
ProcVersionSignature: Ubuntu 3.5.0-23.35~precise1-generic 3.5.7.2
Uname: Linux 3.5.0-23-generic x86_64
NonfreeKernelModules: fglrx
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 1: Generic [HD-Audio Generic], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  ubuntu     1603 F.... pulseaudio
 /dev/snd/controlC0:  ubuntu     1603 F.... pulseaudio
CRDA:
 country TW:
        (2402 - 2472 @ 40), (3, 27)
        (5270 - 5330 @ 40), (3, 17), DFS
        (5735 - 5815 @ 40), (3, 30)
Card0.Amixer.info:
 Card hw:0 'HDMI'/'HDA ATI HDMI at 0xf0444000 irq 49'
   Mixer name   : 'ATI R6xx HDMI'
   Components   : 'HDA:1002aa01,00aa0100,00100300'
   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'/'HD-Audio Generic at 0xf0440000 irq 16'
   Mixer name   : 'IDT 92HD87B2/4'
   Components   : 'HDA:111d76d9,103c184c,00100107'
   Controls      : 18
   Simple ctrls  : 10
Date: Tue Mar  5 03:49:11 2013
HibernationDevice: RESUME=UUID=72dc2241-1d47-4fc9-a41c-52c4a2d3e82f
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 
(20130213)
MachineType: Hewlett-Packard HP Pavilion g7 Notebook PC
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-23-generic 
root=UUID=0f5fb0c5-2971-4d62-9537-0c1b1aa384c6 ro quiet splash initcall_debug 
vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-23-generic N/A
 linux-backports-modules-3.5.0-23-generic  N/A
 linux-firmware                            1.79.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/17/2012
dmi.bios.vendor: Insyde
dmi.bios.version: F.21
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 184C
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 57.34
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnInsyde:bvrF.21:bd10/17/2012:svnHewlett-Packard:pnHPPaviliong7NotebookPC:pvr089D110000005010000020100:rvnHewlett-Packard:rn184C:rvr57.34:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion g7 Notebook PC
dmi.product.version: 089D110000005010000020100
dmi.sys.vendor: Hewlett-Packard

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 201209-11726 amd64 apport-bug precise qa-kernel-lts-testing 
running-unity taipei-lab

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https://bugs.launchpad.net/bugs/1146406

Title:
  HP Pavilion G7 - no HDMI audio

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