Basically my network won't start. Can't use wired connections.
To make it a further brain-scratcher, when booting into recovery, and using the network console, the network comes up and works. Outside of recovery nothing.
As far as I can tell no settings changed between powering off and on since last time it worked, except for an automatic kernel upgrade. Using an older kernel does not seem to help.
Also this hardware configuration worked perfectly fine for over a year with kernel upgrades and all. Network was always automatic.
Information for follow up questions...
Network manager is running.
Strangely enough, my network interface was never started, nor was DHCP. Where in the configuration can I find this?
To manually resolve the problem:
sudo ifconfig eth0 up sudo /etc/dhclient
What could have happened in my config to not make this work automatically.
> lspci | grep net > 6:00:19.0 Ethernet controller: Intel Corporation 82566DM-2 Gigabit Network Connection (rev 02)
Contents of /etc/network/interfaces
auto lo iface lo inet loopback
auto eth0 iface eth0 inet dhcp
the eth0 interface comes up, but the
dhclient does not.
The problem re-occurred when waking up from sleep.