# dmesg | grep -i usb
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci_hcd 0000:00:13.2: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:13.2: USB 2.0 started, EHCI 1.00
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
uhci_hcd: USB Universal Host Controller Interface driver
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci_hcd 0000:00:13.0: new USB bus registered, assigned bus number 2
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
ohci_hcd 0000:00:13.1: new USB bus registered, assigned bus number 3
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
usb 1-2: new high speed USB device using ehci_hcd and address 2
usb 1-2: device descriptor read/64, error -71
usb 1-2: device descriptor read/64, error -71
usb 1-2: new high speed USB device using ehci_hcd and address 3
usb 1-2: device descriptor read/64, error -71
usb 1-2: device descriptor read/64, error -71
usb 1-2: new high speed USB device using ehci_hcd and address 4
usb 1-2: device not accepting address 4, error -71
usb 1-2: new high speed USB device using ehci_hcd and address 5
usb 1-2: device not accepting address 5, error -71
hub 1-0:1.0: unable to enumerate USB device on port 2
usb 3-1: new full speed USB device using ohci_hcd and address 2
usb 3-1: not running at top speed; connect to a high speed hub
usb 3-1: configuration #1 chosen from 1 choice
Registered led device: rt73usb-phy0::radio
Registered led device: rt73usb-phy0::assoc
Registered led device: rt73usb-phy0::quality
usbcore: registered new interface driver rt73usb
usbcore: registered new interface driver rt2500usb
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin
rt73usb 3-1:1.0: firmware: requesting rt73.bin