I have a dual boot laptop that I am trying to get a good Linux distro installed onto it. For an interenet connection, I use a cable modem attached through the integrated RTL-8139 ethernet card. Under Windows XP, the internet connection works just fine. Under Fedora Core 3, the internet connection also worked just fine. But recently I decided to give a different distro a try. I tried the Debian-based Ubuntu distro. However, I couldn't even get it fully installed because the ethernet connection (which is needed to download packages) would not stay working long enough to get everything downloaded. I gave Debian itself a try from a net install CD and managed to get everything installed before the connection stopped working. But, once everything was installed, I was still left without a reliable ethernet connection so I figured I would give Mandrake a try since it isn't Debian-based. I installed it but, once again, the ethernet connection won't work for long before stopping. I tried "ifdown eth0" then "ifup eth0" and it didn't work (not that I want to do that every 5 minutes anyway.)
The connection still works when I boot into Windows XP so I know it's not a hardware problem. Does anyone know what is going wrong and how to fix it? I would love to install Ubuntu again if I could get my ethernet to work long enough to download the packages.