Network manager falsly reports "No network connection" after hibernation on Tribe-2
After resuming from hibernation on Tribe-2, the network manager reports "No network connection". However, ifconfig -a shows that the eth0 network interface is up and an IP address has been assigned to it. Even pinging to the outside works.
This problem has been reproduced on a few laptops and desktops, so it seems to be generalized.