[LAU] USB card oddness

[Bob van der Poel]

On Tue, Dec 10, 2013 at 6:04 PM, Gabriel M. Beddingfield
<gabrbedd at gmail.com> wrote:
> On 12/10/2013 02:12 PM, Bob van der Poel wrote:
>>
>> Figured it out after a few hours :) We'd only recently plugged her
>> mouse into the same multiport. If the "telephone" is plugged into a
>> different port, it works. If the mouse is not plugged into the
>> multiport, it works.
>
>
> Yeah, that's one of the hidden pull-your-hair-out gotchas of USB Audio.  I
> ran into it once where an audio device was on the same hub as a webcam --
> and that didn't work well.
>
> The deal is that the audio device reserves a certain amount of bandwidth
> over USB.  If it can't get -- it won't even try to work.  So if some other
> device has reserved the bandwidth you need (which they can), then there's no
> room left over for yours.
>
> -gabe

Makes sense. But all that's on the port is a mouse and the telephone.
I don't see either one using much bandwidth. She uses the same port to
read pics from a camera, but that was not plugged. And, I rebooted to
make sure things were cleared out. Guess I've got a greedy mouse :)


-- 
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Bob van der Poel ** Wynndel, British Columbia, CANADA **
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