On Fri, 11 May 2012, Peter Stuge wrote: > Sarah Sharp wrote: > > Maybe we need an "off" setting that forces the port off? > > FWIW this would be very welcome in libusb, to do a hard reset of > bus-powered devices. > > It can be attempted via SET_FEATURE(PORT_POWER) to the hub, but a > "real" API would be nice. But remember that such an API would be very unreliable. Many hubs and root hubs cannot shut off port power at all, and some of the remaining ones use ganged power switches (you have to turn off all the ports in a gang before power is removed from any of them). Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
