Re: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+

[James Courtier-Dutton]

Dominik Wezel wrote:
> Problem
> =======
> When turning on the laptop and during POST and GrUB loading, all ports 
> on the hub are enabled.  During the USB initialization phase, when the 
> hub is detected, shortly all ports become disabled, then turn on again 
> (uhci_hcd detects the lo-speed ports).  Upon initialization of ehci_hcd 
> however, the ports are disconnected again (for good):

Use uhci_hcd or ehci_hcd, but never both at the same time.
ehci_hcd will work with all lo-speed ports, so uhci_hcd is then no needed.

James

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