On Wed, 5 Jul 2006, Paulo R. Zanoni wrote:

> Ah, yes, as a quick test I can. They keyboard works fine if it's connected
> to the computer instead of the hub.
> 
> The problem is probably the hub.
> Also, I tested the same keyboard with another hub, the keyboard works.
> Also, I tested with the original hub, but another keyboard, and it worked
> too.
> 
> The problem is this hub+keyboard combination...

It frequently happens that people find certain hardware combinations 
don't work well.

> But, infortunatelly, changing the HUB or the keyboard isn't an option
> here. I MUST make it work, even if it's an ugly solution, with this
> hardware... (and it's not just because I "want to make it work"... I
> really can't change...)
> Isn't there a way I can tell the keyboard to "be usb 1.1" and tell the hub
> "be usb 1.1" ? Will it work?

Well, the keyboard already _is_ USB 1.1.

There is no way to tell a USB-2.0 hub to behave as a USB-1.1 hub.

On the other hand, if you don't have any high-speed USB devices (other 
than the hub itself) plugged into your computer, you could try doing 
"rmmod ehci-hcd".  This would force everything to run at full-speed or 
low-speed, and then maybe the keyboard/hub combination would work better.

Alan Stern


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