dmesg | grep usb 

ergibt:

[    0.203913] usbcore: registered new interface driver usbfs
[    0.203931] usbcore: registered new interface driver hub
[    0.203970] usbcore: registered new device driver usb
[    0.468171] usb usb1: configuration #1 chosen from 1 choice
[    0.554384] usb usb2: configuration #1 chosen from 1 choice
[    0.646098] usb usb3: configuration #1 chosen from 1 choice
[    1.337821] usb 2-1: new full speed USB device using ohci_hcd and address 2
[    1.552253] usb 2-1: configuration #1 chosen from 1 choice
[    1.856022] usb 3-1: new low speed USB device using ohci_hcd and address 2
[    2.070918] usb 3-1: configuration #1 chosen from 1 choice
[    2.376023] usb 3-2: new full speed USB device using ohci_hcd and address 3
[    2.556020] usb 3-2: device descriptor read/64, error -62
[    2.840019] usb 3-2: device descriptor read/64, error -62
[    3.120019] usb 3-2: new full speed USB device using ohci_hcd and address 4
[    3.300018] usb 3-2: device descriptor read/64, error -62
[    3.584017] usb 3-2: device descriptor read/64, error -62
[    3.864019] usb 3-2: new full speed USB device using ohci_hcd and address 5
[    4.272019] usb 3-2: device not accepting address 5, error -62
[    4.448020] usb 3-2: new full speed USB device using ohci_hcd and address 6
[    4.856023] usb 3-2: device not accepting address 6, error -62
[    7.179107] usbcore: registered new interface driver hiddev
[    7.185695] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:02.1/usb3/3-1/3-1:1.0/input/input4
[    7.185831] generic-usb 0003:046D:C00E.0001: input,hidraw0: USB HID v1.10 Mouse [Logitech USB-PS/2 Optical Mouse] on usb-0000:00:02.1-1/input0
[    7.185874] usbcore: registered new interface driver usbhid
[    7.185878] usbhid: v2.6:USB HID core driver
[   18.705290] eth2: register 'cdc_ether' at usb-0000:00:02.0-1, CDC Ethernet Device, 00:15:0c:4a:43:9d
[   18.705327] usbcore: registered new interface driver cdc_ether

FTDI ziehen, stecken:

dmesg | grep usb

... ergibt gleiches wie oben plus:

[ 2684.188022] usb 3-2: new full speed USB device using ohci_hcd and address 7
[ 2684.415852] usb 3-2: configuration #1 chosen from 1 choice
[ 2684.506937] usbcore: registered new interface driver usbserial
[ 2684.509474] usbcore: registered new interface driver usbserial_generic
[ 2684.509479] usbserial: USB Serial Driver core
[ 2684.547717] usb 3-2: Detected FT232RL
[ 2684.547721] usb 3-2: Number of endpoints 2
[ 2684.547724] usb 3-2: Endpoint 1 MaxPacketSize 64
[ 2684.547727] usb 3-2: Endpoint 2 MaxPacketSize 64
[ 2684.547729] usb 3-2: Setting MaxPacketSize 64
[ 2684.549903] usb 3-2: FTDI USB Serial Device converter now attached to ttyUSB0
[ 2684.549934] usbcore: registered new interface driver ftdi_sio

... läuft - nur leider nicht beim Booten