Messages in this thread | | | From | Jan De Luyck <> | Subject | Re: USB EHCI Problem with Low Speed Devices on kernel 2.6.11+ | Date | Mon, 29 Aug 2005 07:28:06 +0200 |
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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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