>> The reason is >> that even though you don't really put any load on the bus, the PHY still >> samples VBUS levels to know when the session is valid (VBUS > 4.4V). > > Hmmm.... that might be the cause of some 'random' USB disconnects > we were seeing. > > We 'fixed' them by cutting the wire in the usb cable and driving the > devices '5v sense' from its local 5v rail. > (The USB device is permanently connected to the motherboard.) > > The ochi driver did recover from the disconnect, but xhci got > terribly confused.
I've noticed this type of thing with xhci (only) as well. - Grant -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
