ivo@ivo:~$  dmesg | tail
[13052.515591] usb 2-1.1: device descriptor read/64, error -32
[13052.691704] usb 2-1.1: device descriptor read/64, error -32
[13052.867795] usb 2-1.1: new full-speed USB device number 29 using ehci-pci
[13052.939832] usb 2-1.1: device descriptor read/64, error -32
[13053.115968] usb 2-1.1: device descriptor read/64, error -32
[13053.299928] usb 2-1.1: new full-speed USB device number 30 using ehci-pci
[13053.708130] usb 2-1.1: device not accepting address 30, error -32
[13053.780408] usb 2-1.1: new full-speed USB device number 31 using ehci-pci
[13054.188430] usb 2-1.1: device not accepting address 31, error -32
[13054.188634] hub 2-1:1.0: unable to enumerate USB device on port 1