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No HDMI sound after upgrade to Kubuntu 11.10 with my hd4770

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  • No HDMI sound after upgrade to Kubuntu 11.10 with my hd4770

    hi i upgrade today from 11.04 to 11.10 and i now use the radeon driver again..

    but the sound do not work?

    any proposals ?

  • #2
    most likely you had a "radeon.audio=1" setting in /etc/default/grub - if you change it run update-grub later and reboot.

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    • #3
      Originally posted by Kano View Post
      most likely you had a "radeon.audio=1" setting in /etc/default/grub - if you change it run update-grub later and reboot.
      sorry i can't find the option "radeon.audio=1" in /etc/default/grub ??

      this are the only options in this file:

      GRUB_DEFAULT=0
      GRUB_HIDDEN_TIMEOUT=0
      GRUB_HIDDEN_TIMEOUT_QUIET=true
      GRUB_TIMEOUT=10
      GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
      GRUB_CMDLINE_LINUX=""

      should i put the option in this file???

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      • #4
        Originally posted by Qaridarium View Post
        sorry i can't find the option "radeon.audio=1" in /etc/default/grub ??

        this are the only options in this file:

        GRUB_DEFAULT=0
        GRUB_HIDDEN_TIMEOUT=0
        GRUB_HIDDEN_TIMEOUT_QUIET=true
        GRUB_TIMEOUT=10
        GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
        GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
        GRUB_CMDLINE_LINUX=""

        should i put the option in this file???
        It's a module option, not a grub option. I'm not too familiar with grub2, but I think you would add it to GRUB_CMDLINE_LINUX_DEFAULT. e.g.,

        GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"

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        • #5
          Originally posted by agd5f View Post
          It's a module option, not a grub option. I'm not too familiar with grub2, but I think you would add it to GRUB_CMDLINE_LINUX_DEFAULT. e.g.,

          GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"
          and because why is this not the default?

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          • #6
            Originally posted by Qaridarium View Post
            and because why is this not the default?
            It causes blank screens with some monitors.

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            • #7
              Originally posted by agd5f View Post
              It causes blank screens with some monitors.
              why does the same functionality works with the catalyst ?

              in my point of view this can't be the source if the catalyst do not have the same black screen ...

              maybe they build an magic auto-detect ?

              Comment


              • #8
                Originally posted by Qaridarium View Post
                why does the same functionality works with the catalyst ?

                in my point of view this can't be the source if the catalyst do not have the same black screen ...

                maybe they build an magic auto-detect ?
                The original audio code was reverse engineered and doesn't quite get everything correct. Improved hdmi audio code is currently under IP review.

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                • #9
                  Originally posted by agd5f View Post
                  The original audio code was reverse engineered and doesn't quite get everything correct. Improved hdmi audio code is currently under IP review.
                  very nice thank you.

                  Comment


                  • #10
                    I realize this is for AMD/ATI and I am running Intel/Nvida, but is the principle the same for Nvida cards? I can't get any sound though HDMI with my GTX 550M.

                    What would I need to write in place of Radeon?
                    Code:
                    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"

                    Comment


                    • #11
                      Originally posted by Kalavere View Post
                      I realize this is for AMD/ATI and I am running Intel/Nvida, but is the principle the same for Nvida cards? I can't get any sound though HDMI with my GTX 550M.

                      What would I need to write in place of Radeon?
                      Code:
                      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"
                      Nvidia is different. I don't know if fermi still has "spdif" crossover cable, as previous generation, but you may want to look it up.
                      Otherwise, its wrong thread to ask anyway.

                      Comment


                      • #12
                        isnt it much simpler to use nv binary drivers?

                        Comment


                        • #13
                          Originally posted by crazycheese View Post
                          Nvidia is different. I don't know if fermi still has "spdif" crossover cable, as previous generation, but you may want to look it up.
                          Otherwise, its wrong thread to ask anyway.
                          Thanks anyways. I've had trouble getting HDMI sound to work on 11.04, 11.10 and over two laptops. Never mind, I'll keep searching!

                          Thanks again.

                          Comment


                          • #14
                            it is possible that you need to change one line in your default.pa - add the correct sink you found out which is working using "speaker-test -D hw:0,x -c2" - be sure all 4 possible spdif channels are unmuted (OO) with alsamixer. use nv binary driver. the x is the device number you get with "aplay -l". for onboard the card number is always 0, but of course not for a desktop system with dedicated gfx card.

                            Comment


                            • #15
                              radeon.audio=1 is for the open-source driver, the proprietary driver doesn't use it. With nvidia you still need the proprietary driver for HDMI audio - Nouveau support for it won't come before the 3.2 or 3.3 kernel.
                              Intel is a different matter. The HDMI audio is a codec chip connected to the onboard sound controller (or even integrated into it?), and the only thing that relates it to the graphics is that it happens to use the same HDMI connection for its output.

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