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I'm running Ubuntu 12.10 and having trouble with the audio output through HDMI on my Acer Aspire one 722. It's using an AMD c-60. I was able to add in the kernel parameter, which was supposed to enable HDMI audio playback but even after running update-grub and rebooting, the problem persists when I choose HDMI as the audio output after plugging in my HDMI cable.

At this point, I'm not sure what else to do.

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You may need to install the actual proprietary drivers for your Radeon card to get HDMI audio working properly. Also pavucontrol allows you to tweak the audio settings much better than the default volume control.

In a Terminal window type these commands:

cd /tmp && wget -O
chmod +x
sudo sh

sudo aticonfig --initial -f

The last command will let you know if installation worked OK.

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I was thinking about that but last time I installed proprietary drivers, it disabled sleep mode for my laptop. Will the same happen here? – Jexams Dec 24 '12 at 18:31 seemed to work for me, but I noticed you said you ran update-grub... It probably overwrote the setting with the defaults once again. (caught that when I also ran update-grub)

Hope it helps :D

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