I was running 16.04.2 LTS today(2017/June/07) and did system update (reboot required) when I brought up the system the wired network was not working .
To get around this issue, I rebooted again in GRUB went to advanced, selected the previous *-generic kernel vmlinuz-4.4.0.78-generic
.
I rebooted and networking is now working, before reboot went into "Network" system setting and noticed that there were no lines for "Wired".
This is my work PC so problem analysis will need to wait until later today (assuming I have the chance) to do some reboots but initially looks like some type of NetManager update issue losing previous information and not auto detecting the network ...
Here are the relevant log entries:
NOTE
george@njcvr25:/var/log/apt$ pwd
/var/log/apt
george@njcvr25:/var/log/apt$ more history.log
Start-Date: 2017-06-02 17:09:53
Commandline: aptdaemon role='role-commit-packages' sender=':1.311'
Upgrade: libldap-2.4-2:amd64 (2.4.42+dfsg-2ubuntu3.1, 2.4.42+dfsg-2ubuntu3.2), libsndfile1:amd64 (1.0.25-10, 1.0.25-10ubuntu0.16.0
4.1)
End-Date: 2017-06-02 17:09:56
Start-Date: 2017-06-02 17:10:03
Commandline: aptdaemon role='role-commit-packages' sender=':1.311'
Upgrade: isc-dhcp-common:amd64 (4.3.3-5ubuntu12.6, 4.3.3-5ubuntu12.7), isc-dhcp-client:amd64 (4.3.3-5ubuntu12.6, 4.3.3-5ubuntu12.7
)
End-Date: 2017-06-02 17:10:07
Start-Date: 2017-06-06 07:51:02
Commandline: aptdaemon role='role-commit-packages' sender=':1.174'
Upgrade: libtasn1-6:amd64 (4.7-3ubuntu0.16.04.1, 4.7-3ubuntu0.16.04.2)
End-Date: 2017-06-06 07:51:04
Start-Date: 2017-06-07 11:32:25
Commandline: aptdaemon role='role-commit-packages' sender=':1.310'
Install: linux-signed-image-4.4.0-79-generic:amd64 (4.4.0-79.100, automatic), linux-image-4.4.0-79-generic:amd64 (4.4.0-79.100, au
tomatic), linux-image-extra-4.4.0-79-generic:amd64 (4.4.0-79.100, automatic), linux-headers-4.4.0-79:amd64 (4.4.0-79.100, automati
c), linux-headers-4.4.0-79-generic:amd64 (4.4.0-79.100, automatic)
Upgrade: libnl-route-3-200:amd64 (3.2.27-1, 3.2.27-1ubuntu0.16.04.1), linux-headers-generic:amd64 (4.4.0.78.84, 4.4.0.79.85), linu
x-libc-dev:amd64 (4.4.0-78.99, 4.4.0-79.100), libnl-genl-3-200:amd64 (3.2.27-1, 3.2.27-1ubuntu0.16.04.1), linux-image-generic:amd6
4 (4.4.0.78.84, 4.4.0.79.85), linux-signed-image-generic:amd64 (4.4.0.78.84, 4.4.0.79.85), linux-signed-generic:amd64 (4.4.0.78.84
, 4.4.0.79.85), libnl-3-200:amd64 (3.2.27-1, 3.2.27-1ubuntu0.16.04.1), lintian:amd64 (2.5.43, 2.5.43ubuntu0.1), linux-generic:amd6
4 (4.4.0.78.84, 4.4.0.79.85)
End-Date: 2017-06-07 11:33:49
george@njcvr25:/var/log/apt$