After upgrading to FC5, I am getting the error: tulip_stop_rxtx() failed repeatedly in dmesg / kernel log output, and my network card won't come up. The machine worked Ok after the initial kernel upgrade, but after doing an upgrade (via yum), I can't get the network card to work (either via DHCP or by manual configuration). Any suggestions? I can try to provide any other information that might be helpful. w