On Mon, 29 Aug 2005, Jan De Luyck wrote: > 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.
Right. EHCI is high-speed only. It needs a companion controller and driver for low- and full-speed devices. -- ~Randy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
