I have a 8.04 (LTS) installation that I recently installed a D-link DGE-530T PCI card into. Works out of the box... for a while. An hour or so after booting the maching, the NIC stops working. Just plain stops, nothing in dmesg and nothing in /var/log/messages about anything wrong.
If I do "dhclient eth1", it re-fetches the IP from the DHCP server and goes back to normal.
What could be the problem here? Should I install the drivers from the CD that shipped with the card?