Unable to get audio through HDMI connection to TV with Ubuntu 14.04

Just fixed my audio issues spent days updating drivers and it ended up being the most basic setting. Permissions, add yourself to the "audio" group. So pop out to terminal and execute the following command.

sudo adduser $USER audio

Hope it works for you as well. It's odd that you are not automatically in that group as sound is an essential service.

Oh, and reboot, just to ensure the permission kicks in.

Try these steps:

1. Install pavucontrol, if you haven't already, using the command:

   sudo apt-get install pavucontrol
   

2. Add your username to the groups audio, pulse, pulse-access, video and voice using the following command:

   sudo usermod -a -G audio,pulse,pulse-access,video,voice $USER
   

   If the command gives you errors on groups that don't exist, just ignore it.

3. Install the latest ALSA drivers using the following commands:

   sudo add-apt-repository ppa:ubuntu-audio-dev/alsa-daily
   sudo apt-get update
   sudo apt-get install oem-audio-hda-daily-dkms

4. Reboot and check if audio over HDMI is working.

Sources:

• http://forums.linuxmint.com/viewtopic.php?f=48&t=153108
• No sound through HDMI out, 13.04