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I upgraded Ubuntu 14.10 to 15.04 but after upgrading I am not able to connect to internet. I want to tell you that I am trying to connect to internet through DSL cable. The error message it is displaying is

Connection activation failed
(1) Creating object for path '/org/freedesktop/NetworkManager/ActivationConnection/4' failed in libnm-glib.
Volker Siegel
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user299731
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  • Have you tried deleting the connection that doesn't work and recreating it? To do that, right click on the network icon -> Edit connections and select delete. Now press add and select Ethernet. – Smile4ever May 23 '15 at 09:29
  • Yeah, I've done this several times but nothing is working – user299731 May 23 '15 at 13:40
  • somebody help out here. i too face the same prob. losing my internet connectivity. have to restart to get the connectivity. then i lose it again after a few minutes – MycrofD Jun 07 '15 at 10:35
  • open your terminal and try executing these commands one by one: 1. sudo sudo ppoeconf and press enter for yes on everything and give your username and password where required then execute the next command 2. sudo pon dsl-provider. this might solve your problem. And to close your connection type 3. sudo poff. – user299731 Jun 09 '15 at 09:13

2 Answers2

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Try this

sudo apt-get install -d --reinstall network-manager network-manager-gnome
sudo apt-get purge network-manager-gnome network-manager
sudo apt-get install network-manager-gnome

Source: http://ubuntuforums.org/showthread.php?t=2239214

Smile4ever
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I tried rebooting, deleting and re-creating the connections, I tried purging and reinstalling the network manager, nothing worked for me...

Until! Another user suggested (re)installing pppoe:

sudo apt-get install pppoe

Worked like a charm :-)

Mark
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