$ lsusb -tv
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 1: Dev 5, If 0, Class=Human Interface Device,
Driver=usbhid, 1.5M
ID 04d9:1503 Holtek Semiconductor, Inc. Keyboard
|__ Port 1: Dev 5, If 1, Class=Human Interface Device,
Driver=usbhid, 1.5M
ID 04d9:1503 Holtek Semiconductor, Inc. Keyboard
I tried my other computer and all the devices seem to have 2 interfaces.
lsusb -tv
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 4: Dev 9, If 1, Class=Human Interface Device,
Driver=usbhid, 12M
ID 25a7:fa61 Areson Technology Corp Elecom Co., Ltd MR-K013
Multicard Reader
|__ Port 4: Dev 9, If 0, Class=Human Interface Device,
Driver=usbhid, 12M
ID 25a7:fa61 Areson Technology Corp Elecom Co., Ltd MR-K013
Multicard Reader
|__ Port 5: Dev 3, If 1, Class=Video, Driver=uvcvideo, 480M
ID 0408:a061 Quanta Computer, Inc.
|__ Port 5: Dev 3, If 0, Class=Video, Driver=uvcvideo, 480M
ID 0408:a061 Quanta Computer, Inc.
|__ Port 7: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 12M
ID 04f3:0c03 Elan Microelectronics Corp.
|__ Port 10: Dev 5, If 0, Class=Wireless, Driver=btusb, 12M
ID 8087:0026 Intel Corp.
|__ Port 10: Dev 5, If 1, Class=Wireless, Driver=btusb, 12M
ID 8087:0026 Intel Corp.
