Ubuntu 14.04 Unable to connect to internet

Question

All of a sudden, I am unable to connect to ethernet... the network manager icon doesn't appear anymore

It used to work perfectly and the ethernet cable is working with another PC.

Here is what I get with ifconfig:

lo        Link encap:Boucle locale  
  inet adr:127.0.0.1  Masque:255.0.0.0
  adr inet6: ::1/128 Scope:Hôte
  UP LOOPBACK RUNNING  MTU:65536  Metric:1
  Packets reçus:10544 erreurs:0 :0 overruns:0 frame:0
  TX packets:10544 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 lg file transmission:0 
  Octets reçus:811701 (811.7 KB) Octets transmis:811701 (811.7 KB)

wlan0     Link encap:Ethernet  HWaddr 48:51:b7:00:d5:66  
  UP BROADCAST MULTICAST  MTU:1500  Metric:1
  Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
  TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 lg file transmission:1000 
  Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)

wlan0:avahi Link encap:Ethernet  HWaddr 48:51:b7:00:d5:66  
  inet adr:169.254.8.18  Bcast:169.254.255.255  Masque:255.255.0.0
  UP BROADCAST MULTICAST  MTU:1500  Metric:1

score 0 · Answer 1 · answered Feb 03 '16 at 11:35

Ubuntu just had a major glitch. One of the last updated caused you & me and probably many others to stay disconnected because network-manager is crashing. This is a major glitch since now users are disconnected from the internet and cannot get the fix for this problem.

Open a terminal and type

grep network-manager /var/log/syslog.*

If you see errors like this one:

init: network-manager main process (1318) killed by SEGV signal

Than you're affected by this bug. You'll have to connect manually without network manager and update the system again with

sudo apt-get update ; sudo apt-get upgrade

If you have an ethernet card than you can simply do

sudo dhclient -v eth0

to restore your connection, Then run the apt-get commands above.

score 0 · Answer 2 · edited Apr 13 '17 at 12:24

You can do this it worked for me , try downloading these package and install(download from device with internet access).

libnl-3-200_3.2.21-1_amd64.deb
libnl-genl-3-200_3.2.21-1_amd64.deb
libnl-route-3-200_3.2.21-1_amd64.deb

and after downloading go to directory where the packages are stored write the command

 dpkg -i *.deb

all the best. you can find here 14.04--Routine update killed network-manager, unable to connect to any networks

Ubuntu 14.04 Unable to connect to internet

2 Answers2