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 -- 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
