ali@Juventus:~$ dmesg |grep usb
[   20.050318] usbcore: registered new interface driver usbfs
[   20.050337] usbcore: registered new interface driver hub
[   20.053939] usbcore: registered new device driver usb
[   20.061085] usb usb1: configuration #1 chosen from 1 choice
[   20.162484] usb usb2: configuration #1 chosen from 1 choice
[   20.266419] usb usb3: configuration #1 chosen from 1 choice
[   20.370359] usb usb4: configuration #1 chosen from 1 choice
[   20.474242] usb usb5: configuration #1 chosen from 1 choice
[   20.506047] usb 2-1: new full speed USB device using uhci_hcd and address 2
[   20.633069] usb usb6: configuration #1 chosen from 1 choice
[   20.756964] usb usb7: configuration #1 chosen from 1 choice
[   20.870282] usb 2-1: device not accepting address 2, error -71
[   20.892307] usb 6-3: new high speed USB device using ehci_hcd and address 2
[   20.935511] usb 6-3: configuration #1 chosen from 1 choice
[   24.072568] usb 3-1: new low speed USB device using uhci_hcd and address 2
[   24.249653] usb 3-1: configuration #1 chosen from 1 choice
[   29.720318] usbcore: registered new interface driver hiddev
[   29.734682] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1:1.0/input/input8
[   29.798106] input,hidraw0: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1d.0-1
[   29.828538] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1:1.1/input/input10
[   29.904362] input,hiddev96,hidraw1: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1d.0-1
[   29.904388] usbcore: registered new interface driver usbhid
[   29.904393] /build/buildd/linux-2.6.24/drivers/hid/usbhid/hid-core.c: v2.6:USB HID core driver
[   64.290637] usb 3-2: new full speed USB device using uhci_hcd and address 3
[   64.328576] usb 3-2: configuration #1 chosen from 1 choice
[   65.007041] usbcore: registered new interface driver libusual
[   65.081965] usbcore: registered new interface driver usb-storage
[   65.081971] usb-storage: device found at 3
[   65.081973] usb-storage: waiting for device to settle before scanning
[   65.100667] usbcore: registered new interface driver usbserial
[   65.100682] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
[   65.100711] usbcore: registered new interface driver usbserial_generic
[   65.100713] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial Driver core
[   65.121132] /build/buildd/linux-2.6.24/drivers/usb/serial/usb-serial.c: USB Serial support registered for GSM modem (1-port)
[   65.121155] usbcore: registered new interface driver option
[   65.121157] /build/buildd/linux-2.6.24/drivers/usb/serial/option.c: USB Driver for GSM modems: v0.7.1
[   65.263906] usb 3-2: USB disconnect, address 3
[   65.599933] usb 3-2: new full speed USB device using uhci_hcd and address 4
[   65.623871] usb 3-2: configuration #1 chosen from 1 choice
[   65.625812] usb-storage: probe of 3-2:1.0 failed with error -5
[   65.626025] usb 3-2: GSM modem (1-port) converter now attached to ttyUSB0
[   65.629655] usb-storage: probe of 3-2:1.1 failed with error -5
[   65.629829] usb 3-2: GSM modem (1-port) converter now attached to ttyUSB1
[   65.637696] usb-storage: device found at 4
[   65.637704] usb-storage: waiting for device to settle before scanning
[   67.345040] usb-storage: device scan complete

ali@Juventus:~$ lsmod |grep usb
usbserial              35816  6 option
usb_storage            73664  0 
libusual               19108  1 usb_storage
usbhid                 31744  0 
hid                    38528  1 usbhid
scsi_mod              150924  6 usb_storage,sbp2,sr_mod,sg,sd_mod,libata
usbcore               145644  8 option,usbserial,usb_storage,libusual,usbhid,ehci_hcd,uhci_hcd