Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 148f:3072 Ralink Technology, Corp. RT3072 Wireless Adapter
Bus 002 Device 002: ID 1bcf:0007 Sunplus Innovation Technology Inc. Optical Mouse
Bus 002 Device 003: ID 413c:2005 Dell Computer Corp. RT7D50 Keyboard
1-8:1.0: No such file or directory
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ohci_hcd/8p, 12M
    |__ Port 6: Dev 2, If 0, Class=HID, Driver=usbhid, 1.5M
    |__ Port 7: Dev 3, If 0, Class=HID, Driver=usbhid, 1.5M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/8p, 480M
    |__ Port 8: Dev 4, If 0, Class=vend., Driver=, 480M