I think I had this bug before with an earlier version of Ubuntu. What had caused it was that I had taken out the lines
auto lo
iface lo inet loopback
from my /etc/network/interfaces file. Adding those lines back in fixed the problem for me. Hope this helps.
I think I had this bug before with an earlier version of Ubuntu. What had caused it was that I had taken out the lines interfaces file. Adding those lines back in fixed the problem for me. Hope this helps.
auto lo
iface lo inet loopback
from my /etc/network/