Comment 2 for bug 505402

Hi Sergey,

UbuntuOne uses NetworkManager to query for network status. In case it is installed and running then UbuntuOne checks for connection state. In case NetworkManager uninstalled or otherwise not running then UbuntuOne software does not check the state and tries to connect anyway.

The best way to make this work is to get NetworkManager to support your WiMax driver, I advice you to open a separate bug report (since I could not find one and I don't have the hardware to test this) for NetworkManager providing the info on how the NM should handle WiMax connections.

Since all applications believe that there is no connectivity when NetworkManager says so, then it is possible to avoid such problem by stopping Network Manager:
#jaunty:
$ sudo /etc/init.d/NetworkManager stop
#karmic:
$ sudo stop network-manager
. In this case UbuntuOne client will not be able to query connection state and will try to connect to the server. If this works you might want to disable NetworkManager startup.