I have tried all the method about changing the router configuration, and I see this :
from
http://info.iet.unipi.it/~luigi/kind...-open-networks
The kindle often complains that it cannot connect to a WiFi network,
but what this really means is that it cannot connect to amazon.com, and this blocks the browser even if local connectivity is available.To make the system believe that the network is reachable (and let the browser work), you can issue the following command:
dbus-send --system /default com.lab126.wifid.cmConnected
I think it's the same problem,but it's not a prefect solution,because it must use the usbnetwork,but I can't connect to my wifi.