On Mon, May 16, 2016 at 02:09:03PM -0700, Brian T. McKee wrote: > I just noticed that timing matters. If I bring the USB devices up one at > a time, with lots of time between power ups, things seem to initialize > better. And there are two ports that won't work much at all and two that > work until this failure occurs. Sounds like a power-draw issue, have you checked to ensure that you aren't just pulling too much power? If you use a powered hub, all is good, right? I'd strongly just recommend doing that. good luck! greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html