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SubjectRe: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+
Date
On Monday 29 August 2005 01:16, James Courtier-Dutton wrote:
> 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.

This seems to be in contrast with what hotplug does automatically: it loads
both ehci_hcd and uhci_hcd here. If I don't load uhci_hcd, lo-speed devices
do not work.

Jan

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