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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Also affects AMD Radeon HD 6480G [1002:9648] on 201107-8258 Lenovo ThinkPad Edge E525
Verified with radeon.audio=1, HDMI audio works

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https://bugs.launchpad.net/bugs/1186879

Title:
  AMD Radeon HD 6250/6480G, No HDMI audio output with radeon driver

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  CID: 201203-10697 Asus X55U (12.04.2)

  By using the radeon driver, there is no HDMI audio output.
  But by using the fglrx driver, HDMI audio works.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.5.0-32-generic 3.5.0-32.53~precise1
  ProcVersionSignature: Ubuntu 3.5.0-32.53~precise1-generic 3.5.7.11
  Uname: Linux 3.5.0-32-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
  ApportVersion: 2.0.1-0ubuntu17.2
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 1: Generic_1 [HD-Audio Generic], device 0: VT1802 Analog [VT1802 Analog]
     Subdevices: 1/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1663 F.... pulseaudio
   /dev/snd/pcmC1D0c:   ubuntu     1663 F...m pulseaudio
   /dev/snd/controlC0:  ubuntu     1663 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 'Generic'/'HD-Audio Generic at 0xfeb44000 irq 47'
     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 0xfeb40000 irq 16'
     Mixer name	: 'VIA VT1802'
     Components	: 'HDA:11068446,10431c23,00100000'
     Controls      : 28
     Simple ctrls  : 16
  Date: Mon Jun  3 14:11:32 2013
  HibernationDevice: RESUME=UUID=fdaaa1bf-4281-4fdc-a2cf-8ae08a9d29a4
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  Lsusb:
   Bus 001 Device 002: ID 058f:a014 Alcor Micro Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  MachineType: ASUSTeK COMPUTER INC. X55U
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-32-generic root=UUID=d034ccfb-863a-43af-ba1c-4e8d6a4638bc ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-32-generic N/A
   linux-backports-modules-3.5.0-32-generic  N/A
   linux-firmware                            1.79.4
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/03/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X55U.410
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X55U
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX55U.410:bd09/03/2012:svnASUSTeKCOMPUTERINC.:pnX55U:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX55U:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X55U
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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