Cannot select HDMI sound output at Notebook TravelMate 5730 with ATI RV620 HDMI

[iflow]

If I attach my HDMI cable to my notebook with Ubuntu 13.04, I can not use the HDMI sound output. But my monitor/graphics (on the other end of the HDMI cable) works. I just do not see the HDMI sound output item in Settings -> Sound Settings (Play sound through). Only the notebook's built in speakers are shown here.

HDMI cable and speaker are working (Tested it with Windows 7).

I tried this without success: http://askubuntu.com/a/287487/175489
Short story:
I downloaded from ALSA Launchpad the package: oem-audio-hda-daily-dkms_0.201307180559~raring1_all.deb. Then installed it and rebooted. No success. Again reinstalled the package via Ubuntu Software Center. No success.
Link: https://code.launchpad.net/~ubuntu-audio-dev/+archive/alsa-daily/+files/oem-audio-hda-daily-dkms_0.201307180559%7Eraring1_all.deb

Ubuntu 13.04 64bit (Everything is up-to-date)
Kernel 3.8.0-26-generic
Graphic Driver: Gallium 0.4 on AMD RV620

Hardware: Graphiccard: AMD/ATI Radeon HD3450 (RV620)

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: anton 2263 F.... pulseaudio
 /dev/snd/controlC0: anton 2263 F.... pulseaudio
 /dev/snd/pcmC0D0p: anton 2263 F...m pulseaudio
Date: Sun Jul 21 15:40:57 2013
InstallationDate: Installed on 2013-07-14 (6 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:HDMI failed
Symptom_Card: RV620 HDMI Audio [Radeon HD 3400 Series] - HDA ATI HDMI
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: anton 2263 F.... pulseaudio
 /dev/snd/controlC0: anton 2263 F.... pulseaudio
 /dev/snd/pcmC0D0p: anton 2263 F...m pulseaudio
Symptom_Jack: Digital Out, HDMI
Symptom_Type: No sound at all
Title: [TravelMate 5730, ATI R6xx HDMI, Digital Out, HDMI] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/30/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.36
dmi.board.name: Homa
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.36:bd10/30/2009:svnAcer:pnTravelMate5730:pvr0100:rvnAcer:rnHoma:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: TravelMate 5730
dmi.product.version: 0100
dmi.sys.vendor: Acer

[Daniel Letzeisen (dtl131)]

Follow workaround 1 here: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/864735

Let us know if it works after reboot.

[iflow (anton-jungwirth)]

Thank you, workaround 1 worked for me to fix the audio problem:

=== Workaround 1 ===

Edit /etc/default/grub and change this line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to this line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"

Now run "sudo update-grub", then reboot your computer.

Source: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/864735