HDMI sound via ATI graphics card

Quick repair

• https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1001842

The HDMI sound device is disabled when the television is turned off.

Workaround 1:

xrandr -display :0 --output DFP2 --off
xrandr -display :0 --output DFP2 --auto

Workaround 2:

1. Go to terminal CTRL+SHIFT+F1
2. Back to Unity CTRL+SHIFT+F7 / 8

Open sound settings, you should see an HDMI Audio device here:

Testing HDMI audio device

First find your HDMI sound device, in this case card 1, device 3:

aplay -l

**** List of PLAYBACK Hardware Devices ****
...
card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

The following file loads the devices:

/etc/pulse/default.pa

Test with aplay or with speaker-test (card 1, device 3):

aplay -D plughw:1,3 ~/Scripts/other/alarm.wav
speaker-test -c 2 -r 48000 -D hw:1,3

Make sure the card is not muted:

• http://ubuntuforums.org/showthread.php?t=1668173&p=10363314#post10363314

sudo apt-get install gnome-alsamixer
alsamixer

• F6 to select the device
• M to mute/unmute