Re: High speed device recognized as full speed

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Clemens Ladisch <clemens@...> writes:

> 
> SZÉKELYI Szabolcs wrote:
> > I have a USB 2.0 device (namely a Creative X-Fi Surround 5.1 sound card) 
> > that's recognized as a 1.1 device thus running at only 12Mbps.
> 
> [...]
> 
> > So my question is: what should I do or change in the kernel source to force 
> > the USB framework to recognize this device as a high speed one?
> 
> It is likely that this device behaves like certain other Creative
> devices, i.e., it runs at full speed until switched into high-speed
> mode with a vendor-specfic command.
> 
> The snd-usb-audio driver knows that command for only one device, the
> Audigy 2 NX.

How can I track that down?

What do you mean "it knows that only for Audigy 2 NX"? Are you trying to say
that it currently only *does* it for Audigy (in which case IMHO it would be
simple to do it for the X-Fi, too) or that it's a kind of secret information,
and no one currently knows this command? In the latter case, what should I do to
find it out?

Can you name the call used to do this? I've found nothing specific to Audigy in
the source of the snd-usb-audio module.

Thanks,
-- 
cc



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