/var/log/message ums0: ELECOM ELECOM USB mouse with wheel , rev 1.10/0.10, addr 4, iclass 3/1 ums0: 3 buttons and Z dir. # usbdev -v Controller /dev/usb0: addr 1: self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 1.00 port 1 powered port 2 addr 2: power 90 mA, config 1, Generic USB Hub(0x0068), Chicony (0x0472), rev 1.00 port 1 addr 3: self powered, config 1, PFU-68 USB Keyboard(0x0068), Chicony (0x0472), rev 1.00 port 2 addr 4: low speed, power 100 mA, config 1, ELECOM USB mouse with wheel (0x001c), ELECOM(0x056e), rev 0.10 port 3 powered