I am currently making use of a Wired Broadband. By default NetworkManager shows that the Auto Ethernet is connected. I was unable to browse through any websites in the browser. I had to disconnect & connect the Auto Ethernet several times in NetworkManager or restart Ubuntu to get it fixed. But following these steps is quiet annoying as this issue happens very frequently.
I browsed through the Internet and got to know that WICD Network Manager fixes this issue. Earlier I have been using Ubuntu 12.04 where the same issue was fixed by making use of WCID Network Manager.
Recently I upgraded to 13.10 and as I got the same network issue in default NetworkManager, I have installed WICD NetworkManager but when I try to open WCID, I get an alert message saying,
Could not connect to wicd's D-Bus interface. Check the wicd log for error messages.
When I click on OK, I get the same message again and when I click on OK again I get the following message,
Error connecting to wicd service via D-Bus. Please ensure the wicd service is running.
Any help to fix this issue is greatly appreciated as this issue was annoying me since I installed 13.10
This might be a symptom of this bug: https://bugs.launchpad.net/ubuntu/+source/wicd/+bug/1132529
The solution that worked for me was to run the following commands from the command line (see comment #22 from above link):
Hope that helps!