Hi, I am running Ubuntu 12.04 on a Dell Optiplex 780. It used to work fine network connectivity no problems with previous versions of Ubuntu but now accessing the web is almost impossible in the last hour I have had to drop and reestablish the connection to the network about 15 times. In fact just about every time I click on a link Firefox just sits there churning away trying to connect and getting nowhere for as long as I care to leave it trying. I have a wired connection via a University LAN. If I disconnect then reconnect then reload the page it is there almost instantly. It doesn't appear to be a Firefox problem as I get similar with aptitude from the comment line and Chromium. It doesn't seem to be a network problem as other computers plugged into the network connect and remain stable. The only weirdness that seems to be from the network is the proxies sometimes it ONLY works with auto detect sometimes it only works with manual and this can vary several times throughout the day. My best guess is something screwy in Ubuntu or a network cable going bad. I have a new cable on order to eliminate that any ideas what else it could be? Stripes.