[gentoo-user] question regarding usb gadget / eth usb

Hi,

I bought this little tiny linux board:
http://www.acmesystems.it/arietta

I setup a sdcard as described there and the board boots --
as far as I can tell, since the user led on the board starts to 
play the heartbeat blues ;)

Now...

I cannot access the board.

As far as I understood the docs, the board uses ethernet over usb
and I thought (read: dont know for sure), that gentoo should
load the appropiate kernel modules itsself ... but it doesnt.

The modules which are there:

/lib/modules/3.17.2-RT/kernel/drivers/usb
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_cdc.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_serial.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_ncm.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_midi.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_dbgp.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_ffs.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_hid.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_audio.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_acm_ms.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_ether.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/gadgetfs.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_multi.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_mass_storage.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_webcam.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/legacy/g_printer.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/udc
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/udc/udc-core.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_fs.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_ecm.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/u_ether.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_obex.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_rndis.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_ecm_subset.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/u_serial.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_acm.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_mass_storage.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_eem.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_serial.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/function/usb_f_ncm.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/gadget/libcomposite.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/xhci-hcd.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/ehci-hcd.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/ohci-pci.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/uhci-hcd.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/ehci-pci.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/host/ohci-hcd.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/storage
/lib/modules/3.17.2-RT/kernel/drivers/usb/storage/usb-storage.ko
/lib/modules/3.17.2-RT/kernel/drivers/usb/class
/lib/modules/3.17.2-RT/kernel/drivers/usb/class/usblp.ko

(I stripped modules which are not of interest here off the list.)

The modules, which are loaded currently (I loaded some "suspicious
modules" manually:


Module                  Size  Used by
usb_f_rndis            13696  0 
u_ether                10405  1 usb_f_rndis
libcomposite           37813  1 usb_f_rndis
udc_core                6734  1 libcomposite
vfat                    9727  0 
fat                    51160  1 vfat
usb_storage            46780  0 
nfnetlink_queue         9095  0 
nfnetlink_log           7199  0 
nfnetlink               5189  2 nfnetlink_log,nfnetlink_queue
nvidia_uvm             35436  0 
snd_seq                47642  0 
snd_usb_audio         117739  0 
snd_usbmidi_lib        19523  1 snd_usb_audio
snd_rawmidi            18198  1 snd_usbmidi_lib
snd_seq_device          5044  2 snd_seq,snd_rawmidi
nvidia              11006492  43 nvidia_uvm
8250_pci               33154  0 
mt352                   5948  1 
dvb_bt8xx              13000  3 
8250                   27922  1 8250_pci
serial_core            21124  1 8250
bt878                   7579  1 dvb_bt8xx
bttv                  115243  2 bt878,dvb_bt8xx
btcx_risc               3139  1 bttv
tveeprom               14281  1 bttv
xhci_hcd               98265  0 
videobuf_dma_sg         8600  1 bttv
ohci_pci                2968  0 
videobuf_core          15135  2 bttv,videobuf_dma_sg
ohci_hcd               27742  1 ohci_pci
snd_hda_codec_via      19230  1 
snd_hda_codec_generic    50309  3 snd_hda_codec_via
i2c_algo_bit            5159  1 bttv
snd_hda_intel          18379  1 
snd_hda_controller     16045  1 snd_hda_intel
snd_hda_codec          89009  4 snd_hda_codec_via,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep               6132  2 snd_usb_audio,snd_hda_codec
snd_pcm                80429  4 snd_usb_audio,snd_hda_codec,snd_hda_intel,snd_hda_controller
ehci_pci                3528  0 
ehci_hcd               41668  1 ehci_pci
snd_timer              18167  2 snd_pcm,snd_seq
snd                    57793  14 snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_via,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device



I used nmap to scan the subnet...but only my fritzbox and and
my beaglebone were found..,

The board itsself runs (currently and only for testing) the
image provided by acmesystem, which is a debian wheezy as far
as I know.

How can I us ethernet over usb with Gentoo to access the Arietta G25
module... ?

Thank you very much in advance for any help!
Best regards,
mcc