On Thu, 10 Nov 2016, Kai-Heng Feng wrote: > Hi, > > On Wed, Nov 9, 2016 at 8:32 PM, Bjørn Mork <bjorn@xxxxxxx> wrote: > > Oliver Neukum <oneukum@xxxxxxxx> writes: > > > >> On Tue, 2016-11-08 at 13:44 -0500, Alan Stern wrote: > >> > >>> These problems could very well be caused by running at SuperSpeed > >>> (USB-3) instead of high speed (USB-2). > > Yes, it's running at SuperSpeed, on a Kabylake laptop. > > It does not have this issue on a Broadwell laptop, also running at SuperSpeed. > > >>> > >>> Is there any way to test what happens when the device is attached to > >>> the computer by a USB-2 cable? That would prevent it from operating at > >>> SuperSpeed. > > I recall old Intel PCH can change the USB host from XHCI to EHCI, > newer PCH does not have this option. > > Is there a way to force XHCI run at HighSpeed? Yes, like I said above: Use a USB-2 cable instead of a USB-3 cable. 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
