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[Raymond <1352525@xxxxxxxxxxxxxxxxxx>]

** Changed in: alsa-driver (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1352525

Title:
  No HDMI audio output

Status in “alsa-driver” package in Ubuntu:
  Incomplete

Bug description:
  I have an ASUS N550JV laptop with Intel HD Graphics 4600 and Nvidia
  GeForce GT 750M GPUs. I'm not using Nvidia GPU, the rendering is done
  on the integrated GPU. When I connect the laptop to a Panasonic Vega
  TV through HDMI I get video output on the TV but no sound. I have
  selected the HDMI output in pavucontrol (the HDMI output is marked as
  "plugged in" there) and I can see the sound is directed to HDMI. I
  also tried to disable pulseaudio and use aplay to test ALSA output but
  there is still no sound.

  'aplay -l' output:

  **** 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: ALC668 Analog [ALC668 Analog]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

  For all card 0 devices I tried this command line:

  aplay -D plughw:0,N /usr/share/sounds/alsa/Front_Right.wav

  and got no sound nor errors. I remember the sound was working at some
  point (I think 13.10 was installed at that time).

  lsb_release -rd
  Description:    Ubuntu 14.04 LTS
  Release:        14.04

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