Re: [tlug] webcam: USB 2.0 controllers: EHCI uses OHCI|UHCI

[jep200404 <jep200404@example.com>]

David Santinoli wrote:

> The nVidia-based mainboard I'm experimenting with claims to have two
> EHCI controllers, but apparently all USB 1.1 devices end up connected to
> a single fallback OHCI controller, no matter where they are plugged in
> physically. 

   EHCI relies on "companion controllers" (OHCI or UHCI) to 
   handle full and low speed devices that aren't connected to 
   high speed hubs. [1]

Try plugging into high speed hubs. 

[1] http://en.wikipedia.org/wiki/Host_controller_interface#EHCI