3

This question already has an answer here:

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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marked as duplicate by jokerdino Apr 18 '17 at 7:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2

Another similar post received an answer which solved problem:

https://askubuntu.com/a/905045/367134

Quoting answer:

As Zoltan Laczko mentioned, from NetworkManager 1.2.4 (ubuntu 16.10) all non-wifi/wwan device are treated as unmanaged (see his answer in a similar question Network Manager refusing to manage wired interfaces). A solution is to create an empty file:

sudo touch /etc/NetworkManager/conf.d/10-globally-managed-devices.conf

... that will overshadow/overwrite the one in /usr/lib and then restart the Network Manager.

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