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Radeon HDMI Linux Audio Might Be Restored Soon

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  • #21
    Can anyone verify if 8 channel LPCM through HDMI works?

    I'm about to build a new HTPC, and now that video decoding can be offloaded to UVD, I would'nt mind decoding the sound on software and sending via HDMI to the receiver. This is also a must for surround gaming (very few, if any, receivers have analogical surround input) and sound in games are always uncompressed.

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    • #22
      Originally posted by Figueiredo View Post
      Can anyone verify if 8 channel LPCM through HDMI works?

      I'm about to build a new HTPC, and now that video decoding can be offloaded to UVD, I would'nt mind decoding the sound on software and sending via HDMI to the receiver. This is also a must for surround gaming (very few, if any, receivers have analogical surround input) and sound in games are always uncompressed.
      I'm pretty sure you only get 2 channels with uncompressed LPCM through HDMI.
      It works with 6 channels encoded in DTS HD (lossless) but doesn't work with Dolby TrueHD.
      I can't test with more, because I don't have the hardware that supports 8 channels (well 8 channels DTS HD sources play fine too, but I can't check if all channels are actually played).

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      • #23
        Basically fglrx hdmi audio support is pretty bad. When you play games it often occurs that hdmi audio just stops working. As oss drivers are often too slow for those games i dont have got a direct comparison however. Therefore i got a headset for gaming, but thats already dead again after 3 months use...

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        • #24
          I hope they'll finally run out of Counter-Strike titles, so that they can port Portal 1/2.

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          • #25
            You lucky bastard

            Originally posted by droidhacker View Post
            "MAY" not= "WILL".
            A lot of it has to do with the equipment you have attached to the HDMI. For example, the Toshiba TV I have plugged into my Radeon 4200. If I change inputs on the TV, say to my satellite box, and then back to the radeon, then I get this awesome pink/purple mode (mismatched YUV vs RGB mode). It only works properly again after a full reinitialization of the connector, either by turning the TV completely off and then back on again, or by restarting the HTPC.
            I upgraded to 64 bit MINT "olivia" and now I dont even have the option of HDMI in sound setting. Only now I learnt about the GRUB thing that does not work. I find it a kind of propaganda stuff, this advice just became so virulent over the forums that the people might have started to believe it does something even without the obligate /solved/ appendix. While it only plagued the search results

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            • #26
              Originally posted by lotofag View Post
              I upgraded to 64 bit MINT "olivia" and now I dont even have the option of HDMI in sound setting. Only now I learnt about the GRUB thing that does not work. I find it a kind of propaganda stuff, this advice just became so virulent over the forums that the people might have started to believe it does something even without the obligate /solved/ appendix. While it only plagued the search results
              Wait what? What are you talking about Lotofag? if you append radeon.audio=1 to your kernel paramaters in /etc/default/grub and do "sudo update-grub" you should have working HDMI audio

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