$ dmesg|grep usb
[ 0.355857] usbcore: registered new interface driver usbfs
[ 0.355923] usbcore: registered new interface driver hub
[ 0.356041] usbcore: registered new device driver usb
[ 1.192127] usb 2-5: new high speed USB device number 2 using ehci_hcd
[ 1.592295] usb 3-4: new full speed USB device number 2 using ohci_hcd
[ 16.728298] usb 3-4: device descriptor read/64, error -110
[ 31.968298] usb 3-4: device descriptor read/64, error -110
[ 32.208296] usb 3-4: new full speed USB device number 3 using ohci_hcd
[ 47.344281] usb 3-4: device descriptor read/64, error -110
[ 62.584293] usb 3-4: device descriptor read/64, error -110
[ 62.824317] usb 3-4: new full speed USB device number 4 using ohci_hcd
[ 67.844875] usb 3-4: device descriptor read/8, error -110
[ 72.964976] usb 3-4: device descriptor read/8, error -110
[ 73.204306] usb 3-4: new full speed USB device number 5 using ohci_hcd
[ 78.225087] usb 3-4: device descriptor read/8, error -110
[ 83.345186] usb 3-4: device descriptor read/8, error -110
[ 83.527402] input: Integrated Camera as /devices/pci0000:00/0000:00:13.2/usb2/2-5/2-5:1.0/input/input10
[ 83.527647] usbcore: registered new interface driver uvcvideo
[ 316.904348] usb 3-1: new low speed USB device number 6 using ohci_hcd
[ 317.212345] usb 3-4: new full speed USB device number 7 using ohci_hcd
[ 332.348343] usb 3-4: device descriptor read/64, error -110
[ 347.588358] usb 3-4: device descriptor read/64, error -110
[ 347.828356] usb 3-4: new full speed USB device number 8 using ohci_hcd
[ 362.964339] usb 3-4: device descriptor read/64, error -110
[ 378.204356] usb 3-4: device descriptor read/64, error -110
[ 378.444349] usb 3-4: new full speed USB device number 9 using ohci_hcd
[ 383.465521] usb 3-4: device descriptor read/8, error -110
[ 388.584461] usb 3-4: device descriptor read/8, error -110
[ 388.824356] usb 3-4: new full speed USB device number 10 using ohci_hcd
[ 393.844748] usb 3-4: device descriptor read/8, error -110
[ 398.964928] usb 3-4: device descriptor read/8, error -110
[ 399.163791] input: Logitech USB Trackball as /devices/pci0000:00/0000:00:12.0/usb3/3-1/3-1:1.0/input/input11
[ 399.164661] generic-usb 0003:046D:C408.0001: input,hidraw0: USB HID v1.10 Mouse [Logitech USB Trackball] on usb-0000:00:12.0-1/input0
[ 399.164726] usbcore: registered new interface driver usbhid
[ 399.164733] usbhid: USB HID core driver
[ 399.448117] usb 3-1: USB disconnect, device number 6
После удаления всё продолжает работать как обычно.
Ubuntu 11.10 beta2
$ dmesg | pastebinit
http://paste.ubuntu.com/700882/
