On Thu, 16 Oct 2014, Lu, Baolu wrote:
>
> On 10/15/2014 6:07 PM, Dmitry Nezhevenko wrote:
> > On Sat, Oct 11, 2014 at 03:51:47PM +0800, Lu, Baolu wrote:
> >> Hi Dmitry,
> >>
> >> Can you please try to disable wakeup of root hub instead of host
> >> controller?
> >>
> > Hi,
> >
> > Sorry for delay. Can you please suggest how to do this?
>
> I always do this with below steps. "lsusb -t" on my machine prints
>
> allen@allen-ivb:/sys/bus/pci/devices/0000:00:14.0/usb3$ lsusb -t
> /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
> /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
> |__ Port 3: Dev 2, If 0, Class=Hub, Driver=hub/3p, 12M
> |__ Port 1: Dev 3, If 0, Class=Human Interface Device,
> Driver=usbhid, 12M
> |__ Port 1: Dev 3, If 1, Class=Human Interface Device,
> Driver=usbhid, 12M
> /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
> |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
> |__ Port 5: Dev 3, If 0, Class=Human Interface Device,
> Driver=usbhid, 1.5M
> |__ Port 6: Dev 4, If 0, Class=Human Interface Device,
> Driver=usbhid, 1.5M
> |__ Port 6: Dev 4, If 1, Class=Human Interface Device,
> Driver=usbhid, 1.5M
> /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
> |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
>
> I want to disable remote wake up of xHC USB2 root hub (/: Bus 03.Port
> 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M).
>
> Find the sys device path of the host controller. (You might need to use
> lspci to get the bus/dev/fun of your xHC).
>
> On my machine, it's /sys/bus/pci/devices/0000:00:14.0.
>
> root@allen-ivb:/sys/devices/pci0000:00/0000:00:14.0# echo disabled >
> usb3/power/wakeup
It doesn't have to be so complicated. You can simply do:
echo disabled >/sys/bus/usb/devices/usb3/power/wakeup
However that file contains "disabled" by default, so doing this may not
accomplish anything.
Alan Stern
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