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
