I have narrowed it down to changes from 2.6.39.4 to 3.0.0 On Fri, Aug 30, 2013 at 11:18 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 30 Aug 2013, Kevin Archer wrote: > >> reading https://wiki.ubuntu.com/Kernel/KernelBisection now.... >> >> On Fri, Aug 30, 2013 at 10:48 AM, Kevin Archer <kevin.archer88@xxxxxxxxx> wrote: >> > yes they were plugged in. >> > Bisection? > > Indeed. > > The only way I can think of to explain what you saw is if there is some > switch controlling the connections between the USB ports in the > computer case and the internal hubs. The "lsusb -v" output clearly > stated that nothing was attached to those hubs, even though you had > plugged various devices into those ports. > > On the other hand, the only thing I know of in the kernel which might > affect such a switch is the xhci-hcd driver. It's possible that > unbinding xhci-hcd isn't sufficient to reset the switch (if it exists) > back to the original setting. Maybe you would need to run a kernel > that doesn't have any xHCI support at all. Can you build such a kernel > and test it? > > Alan Stern > -- 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
