dmesg | egrep usb

dmesg | egrep usb
[    0.107129] usbcore: registered new interface driver usbfs
[    0.107151] usbcore: registered new interface driver hub
[    0.107215] usbcore: registered new device driver usb
[    1.148350] usb 2-1: new low speed USB device using uhci_hcd and address 2
[    1.568088] usb 3-1: new low speed USB device using uhci_hcd and address 2
[    1.673286] input: NOVATEK USB Keyboard as /devices/pci0000:00/0000:00:10.0/usb2/2-1/2-1:1.0/input/input3
[    1.673629] generic-usb 0003:0603:00F2.0001: input,hidraw0: USB HID v1.10 Keyboard [NOVATEK USB Keyboard] on usb-0000:00:10.0-1/input0
[    1.710575] input: NOVATEK USB Keyboard as /devices/pci0000:00/0000:00:10.0/usb2/2-1/2-1:1.1/input/input4
[    1.711285] generic-usb 0003:0603:00F2.0002: input,hiddev0,hidraw1: USB HID v1.10 Device [NOVATEK USB Keyboard] on usb-0000:00:10.0-1/input1
[    1.711467] usbcore: registered new interface driver usbhid
[    1.711471] usbhid: USB HID core driver
[    1.826480] input: HID 1241:1177 as /devices/pci0000:00/0000:00:10.1/usb3/3-1/3-1:1.0/input/input5
[    1.826727] generic-usb 0003:1241:1177.0003: input,hidraw2: USB HID v1.10 Mouse [HID 1241:1177] on usb-0000:00:10.1-1/input0
[    2.072034] usb 4-2: new full speed USB device using uhci_hcd and address 2
[    2.255144] usbcore: registered new interface driver uas
[    2.388539] scsi4 : usb-storage 4-2:1.0
[    2.392228] usbcore: registered new interface driver usb-storage
[  396.472066] usb 4-2: USB disconnect, address 2
[  425.924100] usb 4-2: new full speed USB device using uhci_hcd and address 3
[  426.102551] scsi5 : usb-storage 4-2:1.0
[  427.968075] usb 4-2: USB disconnect, address 3
[  428.736050] usb 4-2: new full speed USB device using uhci_hcd and address 4
[  428.916436] scsi6 : usb-storage 4-2:1.3
[  428.997351] usbcore: registered new interface driver cdc_acm
[  429.011757] usbcore: registered new interface driver usbserial
[  429.015968] usbcore: registered new interface driver usbserial_generic
[  429.015979] usbserial: USB Serial Driver core
[  429.036150] usb 4-2: palm_os_4_probe - error -32 getting connection info
[  429.040805] usb 4-2: Handspring Visor / Palm OS converter now attached to ttyUSB0
[  429.041026] usb 4-2: Handspring Visor / Palm OS converter now attached to ttyUSB1
[  429.042889] usbcore: registered new interface driver visor