DEVICE addr 1 DEVICE descriptor: bLength=18 bDescriptorType=device(1) bcdUSB=3.00 bDeviceClass=9 bDeviceSubClass=0 bDeviceProtocol=1 bMaxPacketSize=9 idVendor=0x8086 idProduct=0x0000 bcdDevice=100 iManufacturer=1(Intel) iProduct=2(xHCI root hub) iSerialNumber=... bNumConfigurations=1 CONFIGURATION descriptor 0: bLength=9 bDescriptorType=config(2) wTotalLength=25 bNumInterfaces=1 bConfigurationValue=1 iConfiguration=0() bmAttributes=c0 bMaxPower=0 mA INTERFACE descriptor 0: bLength=9 bDescriptorType=interface(4) bInterfaceNumber=0 bAlternateSetting=0 bNumEndpoints=1 bInterfaceClass=9 bInterfaceSubClass=0 bInterfaceProtocol=0 iInterface=0() ENDPOINT descriptor: bLength=7 bDescriptorType=endpoint(5) bEndpointAddress=1-in bmAttributes=interrupt wMaxPacketSize=2 bInterval=255 current configuration 1 HUB descriptor: weird descriptorType, should be 41 bDescLength=25 bDescriptorType=42 bNbrPorts=16 wHubCharacteristics=00 bPwrOn2PwrGood=10 bHubContrCurrent=0 DeviceRemovable=0