On 04/11/14 07:07, Erich Dollansky wrote:
It is either the error handling of FreeBSD or the quality of the
electrical signal.


The port speed is decided by the hardware after port reset.

Setting "sysctl hw.usb.uhub.debug=15" should reveal some more information about the port reset sequence.

Please also ensure you are running 9/10-stable when testing, hence there are some minor fixes for XHCI every now and then.

Try to collect some more logs from UHUB driver first. Compare bad and good case.

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