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Thread: No sound on powerpc, soundcard not detected

  1. #1
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    No sound on powerpc, soundcard not detected

    Hi,

    I am running Lubuntu 13.10 on, among other machines, a Mac iBook G4.

    I hear the signature sound on turning the machine on, but there is no sound when playing audio or video.

    Code:
    robert@lubuntu-ibookg4:~$  aplay -l
    aplay: device_list:268: no soundcards found...
    I have read the advice here, and everything appears in order: https://wiki.ubuntu.com/PowerPCFAQ#W...ve_no_sound.3F

    My sound does not appear to be muted*.

    Modules:

    snd-powermac is loaded.

    The following are blacklisted:
    snd-aoa
    snd-aoa-fabric-layout
    snd-aoa-soundbus
    snd-aoa-i2sbus
    snd-aoa-codec-tas

    (* The above link gives the advice: "You need to check more than just your master volume,
    for example the volume of the PCM channel maybe set to zero". However, I do not know how to
    check the "PCM channel". I have installed gnome-alsamixer, but it does not appear to open properly i.e.
    the GUI opens but without any controls, just a blank window).

    Any help gratefully received.

    Many thanks.

  2. #2
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    Re: No sound on powerpc, soundcard not detected

    I found this but have no idea what, exactly, to do with the patch:

    http://lists.debian.org/debian-power.../msg00031.html

  3. #3
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    Re: No sound on powerpc, soundcard not detected

    I now realise that this patch wouldn't help, as it is for an iBook requiring the snd-aoa module, whereas mine apparently should require the snd-powermac module.

    Still looking for a solution...

    Quote Originally Posted by rdh61 View Post
    I found this but have no idea what, exactly, to do with the patch:

    http://lists.debian.org/debian-power.../msg00031.html

  4. #4
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    Re: No sound on powerpc, soundcard not detected

    For anybody who's interested, the problem was that I had failed to consider that I might have both the wrong sound module loaded AND one of the volume controls muted. Thus when I tried with the other sound modules I did not at the same time re-try with alsamixer. (Reading above, see that alsamixer would not show any controls with snd-powermac loaded).

    The solution was to ensure that these modules were loaded:

    snd-aoa
    snd-aoa-fabric-layout
    snd-aoa-soundbus
    snd-aoa-i2sbus
    snd-aoa-codec-tas

    and this one blacklisted:

    snd-powermac

    i.e. the opposite of the configuration installed by default.

    Details here: https://wiki.ubuntu.com/PowerPCFAQ#W...ve_no_sound.3F

    Then, from a terminal I opened alsamixer, which now displayed normally. I toggled "PCM" to unmuted by selecting it and typing "m", then crucially I did the same with "Headphone". Without this last step there was still no sound, although what this has to do with it I don't know as I don't have any headphones attached.

    Anyway, that worked.
    Last edited by rdh61; January 4th, 2014 at 06:20 PM.

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