I was prompted to upgrade from 16.4 to 16.10 (edit: was just prompted to upgrade to 17.04 and same issue persists), I did and accepted all suggested removals, updates etc and now do not have internet access via ethernet (wireless still works).
I have restarted twice, and turned modem off/on in the hopes of triggering some needed 're-configuration'.
In the system tray, when clicking on the wireless icon, next to Wired it just says unmanaged.
Troubleshooting Below
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I tried (from https://askubuntu.com/a/2905/367134):
cd /etc/NetworkManager/
sudo vim NetworkManager.conf
and changed:
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
to:
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=true
and then:
sudo service network-manager restart
and restarted system and still have Wired unmanaged.
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I tried (from https://askubuntu.com/a/513615/367134):
sudo ifconfig eno1 up
and restarted system and still have Wired unmanaged.
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I tried (from https://askubuntu.com/a/547875/367134):
sudo ip link set eno1 up
and restarted system and still have Wired unmanaged.
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Have found other posts on network issues ask for output like the following - so in case it helps:
sudo lshw -short | grep network
/0/100/1c/0 wlp1s0 network Wireless 8260
/0/100/1f.6 eno1 network Ethernet Connection I219-V
AND:
sudo lshw -C network
*-network
description: Wireless interface
product: Wireless 8260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlp1s0
version: 3a
serial: 00:c2:c6:a1:9f:91
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.8.0-46-generic firmware=21.302800.0 ip=192.168.1.2 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:279 memory:df000000-df001fff
*-network DISABLED
description: Ethernet interface
product: Ethernet Connection I219-V
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: eno1
version: 21
serial: b8:ae:ed:7e:79:73
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.13-4 latency=0 link=no multicast=yes port=twisted pair
resources: irq:276 memory:df100000-df11ffff
AND:
lspci
00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
00:1e.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO UART Controller #0 (rev 21)
00:1e.6 SD Host controller: Intel Corporation Sunrise Point-LP Secure Digital IO Controller (rev 21)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection I219-V (rev 21)
01:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
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Contents of /etc/network/interfaces is:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
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