[maemo-developers] USB Networking doesn't work on my N810 (diablo) and Ubuntu Linux 8.04

[From: Andrea Grandi]

Hi all,

I've to add another thing... even on this PC (on which USB Networking
was working fine) if I disconnect the cable and I connect it again, I
cannot have usb-networking working anymore. In the dmesg of this PC I
get these errors:

[  829.444387] usb0: unregister 'cdc_ether' usb-0000:00:07.2-2, CDC
Ethernet Device
[  836.877218] usb 1-2: new full speed USB device using uhci_hcd and address 3
[  837.001017] usb 1-2: device descriptor read/64, error -71
[  837.224727] usb 1-2: device descriptor read/64, error -71
[  837.440448] usb 1-2: new full speed USB device using uhci_hcd and address 4
[  837.560273] usb 1-2: device descriptor read/64, error -71
[  837.783991] usb 1-2: device descriptor read/64, error -71
[  837.999717] usb 1-2: new full speed USB device using uhci_hcd and address 5
[  838.407185] usb 1-2: device not accepting address 5, error -71
[  838.519071] usb 1-2: new full speed USB device using uhci_hcd and address 6
[  838.926529] usb 1-2: device not accepting address 6, error -71
[  890.373275] usb 1-2: new full speed USB device using uhci_hcd and address 7

If I try to bring up the usb0 interface.

The first time I connected the cable, the usb0 interface was bring up
automatically.

2008/7/21 Andrea Grandi <a.grandi at gmail.com>:
> Hi,
>
>> The dmesg output from the tablet shows nothing with usb, gadget, or
>> ether, just a lot of noise.  Try "dmesg | grep -3 -i usb" and or grep
>> for ether or gadget.
>
> I've just tested USB Networking on another PC: an old one I've, with
> the same Ubuntu 8.04, and the usb connection works fine with this
> pc!!!
>
>> 1. The N810 is in USB host mode, not target mode.
>
> I don't think so... else it would not work with the other PC
>
>> 2. The g_ether module didn't register (not in dmesg, but should be,
>> with either success or failure - note the mass storage gadget will
>> block g_ether).
>
> it's possible, but... why? What's wrong in my system?
>
>> 3. Bad cable or USB port or something.  cdc_ether is there but doesn't
>> see anything to bind to.
>
> the usb cable and/or port work fine with the other PC.
>
> At this point I think the problem is on the Ubuntu system I've on this
> notebook. How can I identify the problem exactly? Maybe a bug in the
> kernel? (I'm usng proposed-updates repository on this machine).
>
> Please let me know if you have any idea.
>
> Best regards,
>
> --
> Andrea Grandi
> email: a.grandi [AT] gmail [DOT] com
> website: http://www.andreagrandi.it
> PGP Key: http://www.andreagrandi.it/pgp_key.asc
>



-- 
Andrea Grandi
email: a.grandi [AT] gmail [DOT] com
website: http://www.andreagrandi.it
PGP Key: http://www.andreagrandi.it/pgp_key.asc