This is a bit of a strange one. Had a power outage, and after everything came back up (no physical damage), this Ubuntu box is starting up with the default/only eth adapter down. Upon a force dhclient lease refresh, it comes back up just fine.
Pertinent output below. Anyone run into this?:
Initial State:
ifconfig -a
enp4s0: flags=4098<BROADCAST,MULTICAST> mtu 1500
ether ff:ff:ff:ff:ff:ff txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Running a dhclient -v to get that lease:
sudo dhclient -v enp4s0
Internet Systems Consortium DHCP Client 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/enp4s0/ff:ff:ff:ff:ff:ff
Sending on LPF/enp4s0/ff:ff:ff:ff:ff:ff
Sending on Socket/fallback
DHCPREQUEST for 192.168.0.6 on enp4s0 to 255.255.255.255 port 67 (xid=0x45190571)
DHCPREQUEST for 192.168.0.6 on enp4s0 to 255.255.255.255 port 67 (xid=0x45190571)
DHCPREQUEST for 192.168.0.6 on enp4s0 to 255.255.255.255 port 67 (xid=0x45190571)
DHCPACK of 192.168.0.6 from 192.168.0.1 (xid=0x71051945)
bound to 192.168.0.6 -- renewal in 39989 seconds.
After that... everything is up and running:
ifconfig -a
enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.6 netmask 255.255.255.0 broadcast 192.168.0.255
ether ff:ff:ff:ff:ff:ff txqueuelen 1000 (Ethernet)
RX packets 206 bytes 202417 (202.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 116 bytes 10053 (10.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Looking for a permanent solution.
This box doesn't have netplan installed, if that helps. I know most do.