I am trying to configure my network connection on my amd desktop machine, but it wont auto detect and there is no roaming mode (im running a newly installed Ubuntu 8.10 Intrepid OS. I have the output from ifconfig:
Before trying any of the other suggestions, you should verify that your AMD desktop machine actually has a valid network connection. There are some commands you can run inside linux to detect link status as well. "sudo ethtool eth0" should work. Check for the line that says "Link detected:" - it's the last in the output on my system. If you don't have a link detected, then check that the network cable is of the right type and is plugged in correctly at both ends - remove it and push it back in again. Verify that both your network switch and the network card in your desktop show the link light. If they don't, try a cable that you know works - eg, one from a different computer. FYI, Ubuntu's default settings after install are for network manager to do DHCP on the network connection, and there is no default firewall. Finally, if you are sure that: * This computer in question has a valid network link * It's plugged into the same switch that your other systems are plugged into * The other systems are getting valid DHCP leases Then you could always try statically configuring this interface. Go the System menu, then Preferences, then Network Configuration, then select eth0, then give it suitable values for your system (eg, an unused IP address, the correct netmask, and the IP address of your gateway machine as the gateway / default route). If, in the Network Configuration ("Network Connection") wizard, there is no eth0 link, it means you or something has tried to configure it manually inside /etc/network/interfaces, and network manager is refusing to touch it. You'll have to edit the file yourself in that case. I think other people have pointed out how.