Unnecessary rant - Was: Re: USB networking in Ubuntu

Andy Green andy at openmoko.com
Wed Aug 6 12:09:30 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
|> The problem I now have is that I am unable to get usb0 recognized as an
|> interface by ifconfig.
|> The command:
|> ifconfig usb0
|> results in
|> SIOCSIFADDR: No such device
|> usb0: ERROR while getting interface flags: No such device
| fr is plugged in and powered on? no suspend?
| if so, unplug it from the host pc, open a konsole/shell and do
| sudo tail -f /var/log/syslog
| have a look at the shell and plug in the fr again.
| any messages?
| there was a bug in one of the last u-boots, that broke about 50% of usb
| connections -- rebooting (the fr or the pc, couldn't figure out which,
| fr first) is supposed to help.
| the lattest u-boots are supposed to fix that.

Yes, there is another way to get this issue unfortunately too.  We moved
~ USB over Ethernet support on the Freerunner into a module.  But, it's
commonly written around that folks should update their kernel by DFU.
This was never a good idea for a modular kernel (it does nothing to
update the modules) and now it's a really bad idea.

If you update your kernel by the packaging from inside the Freerunner it
won't make this problem as it updates the modules at the same time (now,
anyway, there were other problems with that method until recently).

If that's what's happened (try the Uboot update first though because
that fits the symptom as well) best plan is nuke these guys on your
device (kernel + matching rootfs) with dfu


and start over.

- -Andy
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