On Mon, Dec 15, 2014 at 06:47:21PM -0200, Gustavo Duarte wrote: > 00:14.0 USB controller: Intel Corporation ValleyView USB xHCI Host > Controller (rev 0e) > > Subsystem: CLEVO/KAPOK Computer Device 5471 > > Kernel driver in use: xhci_hcd One host controller. > Seems like here is happening you are saying, one host-controller > (xHCI) manage the three USB port, right ? Yes. > May be i have a confusion, and i sorry for that, may be what i am > asking it is impossible or may be is a blunder, any way following is > my thought: > " > I know that there are several PC, Notebooks with BIOS with the > capability to enable/disable xHCI USB mode, where you can choice, > xHCI or EHCI. > For this reason i thought that could be possible, instead by BIOS, > through some kernel configuration or passing a switch parameter at > boot time achieve the same behaviour. > " > > Do you are saying that, as this notebook has only one usb > host-controller, these option isn't possible ? Looks like it. But I don't know what your bios looks like, poke around in there and see if you can find a setting like that. I've never heard of such a thing though. The xhci controller is a physical chip, it can't work like a ehci controller. > So the only remainder way to resolve this, is trying with a new one kernel ? To see if the bug you are having with a USB 3 device is fixed, yes. You will not be able to ever get the ehci driver to work with this device no matter what kernel you change to, sorry. greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
