Re: Fixed device number attribution

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On 9/6/07, Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> wrote:
> Rene Herman wrote:
> > If you load the modules with a "index=N" parameter, this will fix the card
> > at number N. Nornally, you do this by sticking
> >
> >       options snd-foo index=0
> >       options snd-bar index=1
> >
> > lines in /etc/modprobe.conf (or /etc/modprobe.d/whatever).
>
> This alone doesn't work when multiple devices are handled by the same driver.
>
> The snd-usb-audio has a "pid" parameter to specify that a device with a
> certain product ID should go to a specifc index.  For example,
>
>         options snd-usb-audio index=1,2 pid=0x1234,0x5678
>
> would force the device with product ID 1234 to come first.
> Vendor and product IDs can be listed with lsusb.

What about multiple identical USB devices?  Surely there is some kind
of hardware GUID that can be used, otherwise no OS could handle this
case...

Lee

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