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    SubjectRe: 2.6.39.2: alsa question: usb sound/card shows up as mixer1/audio1?
    Justin Piszcz wrote:
    > I bought two of these but they are actually different devices, on one host
    > it works ok, on the other, I get this:
    > ...
    > $ cat /proc/asound/cards
    > 1 [Device ]: USB-Audio - C-Media USB Audio Device
    > C-Media USB Audio Device at usb-0000:00:1d.7-2.4, full speed
    >
    > On the working host:
    > $ cat /proc/asound/cards
    > 0 [Device ]: USB-Audio - USB PnP Sound Device
    > C-Media Electronics Inc. USB PnP Sound Device at usb-0000:00:1d.7-2.4, full spe
    >
    > Any clue why one is mapped to [1] and the other [0], where the one that is
    > [0] works properly and the [1] does not?

    Some distributions configure USB devices to not load at index 0 to
    prevent conflicts with the primary PCI sound card. Have a look into
    /etc/modprobe.d/.


    Regards,
    Clemens


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