No audio through hdmi (Debian 7.5)

[Malvazar]

Okay now I have a really strange problem. I get picture through the hdmi connection of my Radeon HD 4670 card, but when I tell the system to use the audio not only do I not get anything it also speeds up any video currently playing. This is the weirdest thing to me and I have no idea where to evern begain to fix it. Help please?

[electrovalent]

Try to boot your system with hdmi pluged and check your sound settings. You have ALSA, PULSE AUDIO installed? Search for them and see how to run basic sound tests. Also check your default sound output on your player, and maybe check from a second player.Booting from a live distro with non-free software support just to see if it is driver related also a good idea.
There is official support for linux drivers from amd/ati. http://support.amd.com/en-us/download/d ... inux%20x86

[Spock]

I had similar problems when I installed wheezy.

I had to select the right sound card output (HDMI) in the gnome settings pannel. I had to repeat this operation for all user accounts.

[sunrat]

You can make a file ending in .conf in /etc/modprobe.d/ to specify sound card order. The default sound card should show as card 0 when you run

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aplay -l

See https://wiki.debian.org/ALSA
and https://wiki.archlinux.org/index.php/Ad ... sound_card

[Malvazar]

I guess I need to clarify a little. My graphics card hdmi audio output dose show up in the audio setting. The problem is that when I select it two things happen. First there is no audio, and second it puts all video on fastfoward (youtube, movie player, vlc, ext.) Also I can't install the catalyst control from the AMD site because I'm using the open source driver. Installing catalyst now corrupts the open source driver and I lost the whole distro. (tried it enough time now to know.... >.>)

[sunrat]

Very weird behaviour, and I can't explain it. Do you have firmware-linux-nonfree installed? It is required for ATI/AMD graphics cards to work properly.

[Malvazar]

I do belive so yes.

[LanManT]

sorry to hijack the thread but i tried this once for my nvidia based media center that's running wheezy 32bit and after making all of the changes that i found searching for an answer i eventually gave up and used an external sound card.

yes the sound card was listed but no audio
yes i changed the order of preference etc etc

[hakerdefo]

According to this,
https://git.kernel.org/cgit/linux/kerne ... 546fd7078a
The upstream kernel since 3.12 contains a patch titled "drm/radeon: fix hdmi audio on DCE3.0/3.1 asics" which should be relevant to your card.
Open '/etc/apt/sources.list' file in a text-editor as root and add the following line to enable Wheezy-Backports repository,

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deb  http://ftp.debian.org/debian/ wheezy-backports main contrib non-free

Next update the package manager cache,

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apt-get update

Since I don't know whether you have a 32 bit Debian install or 64 bit system install I'll provide instructions for both. Choose one according to your system,
64 bit:

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apt-get install -t wheezy-backports linux-image-amd64 linux-headers-amd64

32 bit:

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apt-get install -t wheezy-backports linux-image-686-pae linux-headers-686-pae

After the installation completes update the grub,

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update-grub

Reboot the machine.
Cheers!!!

[Malvazar]

OMG! I could kiss you sir! It worked!!!!!! THANKYOU!

[cesaratw]

Thanks for ur answer hakerdefo, you saved my life. Greeting!