Ubuntu – No sound using DVI to HDMI adapter

hdmisound

The sound is working when I switch to RGB but it's not working when I switch to HDMI (DVI-HDMI).

Why is there no sound when using DVI to HDMI adapter? How can I fix it?

    **** List of PLAYBACK Hardware Devices ****
card 0: MID [HDA Intel MID], device 0: ALC888 Analog [ALC888 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: MID [HDA Intel MID], device 1: ALC888 Digital [ALC888 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: MID [HDA Intel MID], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Monitor is 32LG80. (HD TV WITH BUILTIN 3.2 CH SURROUND SOUND)
Using DVI-D (Dual link) to HDMI adapter and a 3.5mm stereo audio cable. Not using any graphic card.
Motherboard: Intel DH55PJ

Cables: DVI to HDMI which doesn't support audio and a 3.5mm stereo cable.

While using Windows 8.1:

  • Config: TV input is HDMI —
    Both audio and Video working.

While using Ubuntu 14.04:

  • Config: TV input is HDMI —
    Audio not working, Video working.

  • Config: TV input is RGB —
    Audio working, Video not working.

Cables: VGA and a 3.5mm stereo cable

While using Windows 8.1:

  • Config: TV input is HDMI —
    Both audio and display working.

While using Ubuntu 14.04:

  • Config: TV input is RGB —
    Both audio and display working but the display resolution is limited to 1024*768 while the native resolution is 1366*768.

Best Answer

To have DVI sound coming through an HDMI adapter, you need to be using a DVI-D connector with a graphics card that supports transmitting audio over DVI.

From Wikipedia:

DVI-D devices output HDMI signals, many including audio, (examples: ATI 3000-series and NVIDIA GTX 200-series video cards), and some multimedia displays input that HDMI signal, including audio, by using a DVI to HDMI adapter. Exact capabilities vary by video card specifications.

According to the above snippet from Wikipedia, it also seems that the display needs to support the input from a DVI to HDMI adapter.

Otherwise, it doesn't look like DVI supports audio.

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