Adding one more machine this bug surfaced on. Motherboard a ASUS M4A785-M with the same Realtek RTL8111 ethernet card. Machine has been running ubuntu 10.04 as the only OS for the past 6 months without issue. Just today, it booted without a network connection, with the router showing a solid amber light indicating a 10Mbs connection, and no lights on the ethernet port at all. After checking the cable/router/modem/rebooting, I found the referenced forum thread. A hard reboot without power for a few minutes restored the network connection.
Adding one more machine this bug surfaced on. Motherboard a ASUS M4A785-M with the same Realtek RTL8111 ethernet card. Machine has been running ubuntu 10.04 as the only OS for the past 6 months without issue. Just today, it booted without a network connection, with the router showing a solid amber light indicating a 10Mbs connection, and no lights on the ethernet port at all. After checking the cable/router/ modem/rebooting , I found the referenced forum thread. A hard reboot without power for a few minutes restored the network connection.