ivo@ivo:~$ dmesg | tail 
[12866.406402] usb 2-1.1: device not accepting address 21, error -32
[12866.478593] usb 2-1.1: new full-speed USB device number 22 using ehci-pci
[12866.886769] usb 2-1.1: device not accepting address 22, error -32
[12866.886992] hub 2-1:1.0: unable to enumerate USB device on port 1
[13349.800755] usb 2-1.1: new high-speed USB device number 23 using ehci-pci
[13349.895040] usb 2-1.1: New USB device found, idVendor=04a9, idProduct=325c
[13349.895048] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[13349.895054] usb 2-1.1: Product: Canon Digital Camera
[13349.895059] usb 2-1.1: Manufacturer: Canon Inc.
[13349.895063] usb 2-1.1: SerialNumber: 09048AD38F89472AAB3455AA463F0D4F