HDMI sound via ATI graphics card

This concerns the AMD proprietary driver (fglrx)

ATI graphics HDMI sound disabled when the television turned off

The ATI graphics card HDMI sound device is disabled when the television is turned off. Bug report:

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

Workaround 1:

1. Turn TV on
2. Reboot
3. Keep it on

Workaround 2:

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

Workaround 3:

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

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