Trouble flashing your Nokia N810?

If you get the error "Error claiming USB interface: Device or resource busy" when flashing your Nokia N810 via USB, this might help:

sudo modprobe -r cdc_phonet

(source: talk.maemo.org)

General information and directions to help flash your N810 can be found here:
http://wiki.maemo.org/Updating_the_tablet_firmware


[updated 2010-03-24]:
In Ubuntu 9.10 it seems to still fail even after removing cdc_phonet, so you have to remove phonet too.

sudo rmmod phonet
sudo rmmod cdc_phonet

(source: talk.maemo.org)