After a recent update to Ubuntu 16, after rebooting will not connect to internet, although seems to be connected and does not complain, except journalctl shows "NM_IS_DEVICES failed". ifconfig looks normal. I don't know where else to look!
Adding more info: I can ping the router and ping another machine on the local net but I can't ping www.google.com. On the router everything looks good, although I see that it lists as connecting to br0 on the Ubuntu machine, with a MAC address that I don't recognize. However it also shows this machine as having a static IP, and that shows the correct MAC address. Plus, it used to work; nothing on the router has been changed. The only thing that happened was that 16.04 was updated, causing a reboot. After the reboot is when the trouble began.