mikhail@localhost:~$ dmesg | grep usb
[    1.267584] usbcore: registered new interface driver usbfs
[    1.267621] usbcore: registered new interface driver hub
[    1.284217] usbcore: registered new device driver usb
[    1.319699] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[    1.319704] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.319709] usb usb1: Product: EHCI Host Controller
[    1.319712] usb usb1: Manufacturer: Linux 3.4-9-rtai-686-pae ehci_hcd
[    1.319716] usb usb1: SerialNumber: 0000:00:1d.0
[    1.320599] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[    1.320604] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.320608] usb usb2: Product: xHCI Host Controller
[    1.320611] usb usb2: Manufacturer: Linux 3.4-9-rtai-686-pae xhci_hcd
[    1.320615] usb usb2: SerialNumber: 0000:00:14.0
[    1.320956] usb usb3: New USB device found, idVendor=1d6b, idProduct=0003
[    1.320961] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    1.320964] usb usb3: Product: xHCI Host Controller
[    1.320968] usb usb3: Manufacturer: Linux 3.4-9-rtai-686-pae xhci_hcd
[    1.320972] usb usb3: SerialNumber: 0000:00:14.0
[    1.631110] usb 1-1: new high-speed USB device number 2 using ehci_hcd
[   17.160510] usb 1-1: device not accepting address 2, error -110
[   17.272313] usb 1-1: new high-speed USB device number 3 using ehci_hcd
[   32.801772] usb 1-1: device not accepting address 3, error -110
[   32.913528] usb 1-1: new high-speed USB device number 4 using ehci_hcd
[   43.327711] usb 1-1: device not accepting address 4, error -110
[   43.439521] usb 1-1: new high-speed USB device number 5 using ehci_hcd
[   53.853668] usb 1-1: device not accepting address 5, error -110