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

Also affect 201306-13869 Dell Inspiron 7737

Simliar issue could be found in bug 1383997

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https://bugs.launchpad.net/bugs/1393701

Title:
  [Dell Inspiron 3442] HDMI audio hotplug detection is not working on
  14.04.1

Status in HWE Next Project:
  New
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  CID: 201402-14675 Dell Inspiron 3442

  The HDMI audio detection does not work on this system with 14.04 +
  update (3.13.0-39)

  Steps:
  1. Install 14.04 + update (3.13.0-39), boot to desktop
  2. Connect an external monitor to the HDMI port

  Expected result:
  * External display available, HDMI audio output option available

  Actual result:
  * Only the external display will be available, no HDMI audio output.

  Debugging info:
  It works with cold-plug.
  Also, if you play a wav file by using "aplay -D hdmi:HDMI,0 test.wav" command, it will make the output option available in "Sound Settings"

  ubuntu@201402-14675:~$ aplay -l
  **** List of PLAYBACK Hardware Devices ****
  card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
    Subdevices: 1/1
    Subdevice #0: subdevice #0
  card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
    Subdevices: 1/1
    Subdevice #0: subdevice #0
  card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
    Subdevices: 1/1
    Subdevice #0: subdevice #0
  card 1: PCH [HDA Intel PCH], device 0: ALC255 Analog [ALC255 Analog]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

  Adding "options snd-hda-intel jackpoll_ms=500" into  /etc/modprobe.d
  /alsa-base.conf as stated in [1] could make the detection work with
  hotplug.

  Alsa-info: http://www.alsa-
  project.org/db/?f=a3e7fabf6a0c1e35d511e610dfdbe7b9d2b305f6

  [1]
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383997/comments/5

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-39-generic 3.13.0-39.66
  ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8
  Uname: Linux 3.13.0-39-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     1527 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     1527 F.... pulseaudio
   /dev/snd/pcmC1D0c:   ubuntu     1527 F...m pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Tue Nov 18 02:54:12 2014
  HibernationDevice: RESUME=UUID=6a176ac4-beb1-4a03-99e6-fd6b53e8b230
  InstallationDate: Installed on 2014-11-18 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Inspiron 3442
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic root=UUID=e3da6884-4737-4003-b0ae-efab9daa5157 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-39-generic N/A
   linux-backports-modules-3.13.0-39-generic  N/A
   linux-firmware                             1.127.8
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/24/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 00G010
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd02/24/2014:svnDellInc.:pnInspiron3442:pvrNotSpecified:rvnDellInc.:rn00G010:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 3442
  dmi.product.version: Not Specified
  dmi.sys.vendor: Dell Inc.

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