On Sun, 2 Apr 2017, Guan Xin wrote: > Bus 002 Device 004: ID 0bc2:2322 Seagate RSS LLC > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.10 > bDeviceClass 0 > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > idVendor 0x0bc2 Seagate RSS LLC > idProduct 0x2322 > bcdDevice 0.00 > iManufacturer 2 Seagate > iProduct 3 Expansion > iSerial 1 NA86BMN6 Okay, nothing suspicious there. Can you acquire a usbmon trace showing what happens when the USB cable is plugged in? Instructions are in the kernel source file Documentation/usb/usbmon.txt. 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