Hello everybody,

I've been installing and configuring 12.04. It was working fine, but after some reboots I started to see some problems with the network.

First, when the computer started up, it was displaying (something like) this message:

Waiting for networking configuration

And then,

waiting 60 seconds


No full network configuration

So searching the web I found out it had to do with the configuration at /etc/network/interfaces. So I partially emptied the file (removed my eth0 configuration) and tried to create the network configuration directly with nm-connection-editor.

Surfing the web works, but when I want to ping with a regular user (to any address), I get

Ping: icmp open socket: Operation not permitted
It's funny though, because if I add sudo, the ping operation executes normally.

I tried going back and re-adding the /etc/network/interfaces configuration, but it's the same.

Now I don't know what I should do, or what is the cause of the problem.

Any help will be greatly appreciated.