View source for HDMI sound via ATI graphics card

[[Category:Ubuntu]]
[[Category:Ubuntu System]]
[[Category:201307]]

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:

# Turn TV on
# Reboot
# Keep it on

Workaround 2:

# Go to terminal CTRL+ALT+F1
# Back to Unity CTRL+ALT+F7 / 8

Workaround 3:

<syntaxhighlight lang=bash>
xrandr -display :0 --output DFP2 --off
xrandr -display :0 --output DFP2 --auto
</syntaxhighlight>

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

<blockquote>
[[File:SoundSettings.png|600px|link=]]
</blockquote>

== Testing HDMI audio device ==

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

<syntaxhighlight lang=bash>
aplay -l
</syntaxhighlight>

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

The following file loads the devices:

<blockquote>
/etc/pulse/default.pa
</blockquote>

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

<syntaxhighlight lang=bash>
aplay -D plughw:1,3 ~/Scripts/other/alarm.wav
speaker-test -c 2 -r 48000 -D hw:1,3
</syntaxhighlight>

Make sure the card is not muted:

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

<syntaxhighlight lang=bash>
sudo apt-get install gnome-alsamixer
alsamixer
</syntaxhighlight>

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