jacek@veteran:~> /usr/sbin/lsusb -tv
2-1:1.0: No such file or directory
2-1:1.3: No such file or directory
2-1:1.4: No such file or directory
/: Bus 08.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=HID, Driver=usbhid, 12M
|__ Port 2: Dev 3, If 0, Class=HID, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=HID, Driver=usbhid, 1.5M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/6p, 480M
|__ Port 1: Dev 7, If 0, Class=still, Driver=, 480M
|__ Port 1: Dev 7, If 1, Class=comm., Driver=cdc_acm, 480M
|__ Port 1: Dev 7, If 2, Class=data, Driver=cdc_acm, 480M
|__ Port 1: Dev 7, If 3, Class=comm., Driver=, 480M
|__ Port 1: Dev 7, If 4, Class=data, Driver=, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/6p, 480M