Internet on Ubuntu 12.04 stopped to work after installing updates from the update manager

Posted by roman sukhanov on Ask Ubuntu See other posts from Ask Ubuntu or by roman sukhanov
Published on 2012-06-05T18:26:51Z Indexed on 2012/06/11 4:46 UTC
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I have wireless Internet access and it worked well on Ubuntu 12.04 LTS until today, when I installed updates from the Update Manager. After the reloading of the computer the sign of Internet disappeared and the Internet connection stopped working.

I went to the Network section of the System settings and got such a message:

The system network services are not compatible with this version.

ping gives the result Network is unreachable.

What should I do?

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