[ubuntu] Internet sharing inconstant

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http://ubuntuforums.org – I have Ubuntu 10.04 in a Dell desk top accessing a wifi hot spot through a USB radio and cantenna. eth(0) is connected to port 1 of the Linksys WRT54G. No set up of the router has been done so it shows as "Linksys" with no security. My Kindle Keyboard can access Amazon through the set up. I have tried a Dell laptop with XP, a Compaq laptop with Linux Mint 9 and a Viewsonic GTab with Android Honeycomb on this setup also. All units will connect to "Linksys" but only the Kindle has successfully gotten on the Internet through the wireless router so far. Why don't the th (Hardware)