No wired and wireless connection found after upgrading 12.04

Posted by ag108 on Ask Ubuntu See other posts from Ask Ubuntu or by ag108
Published on 2012-09-18T14:35:20Z Indexed on 2012/09/18 15:54 UTC
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12.04

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wireless

After upgrading 12.04 LTS, my wired connection works but no wireless connection found. I tried many suggestion for wireless connection on Ubuntu forum but nothing works for me.

Now, maybe by mistake, I am also unable to connect Internet through wired connection.

Now,
(1) its says "No network devices available" and
(2) in System Settings ? Hardware ? no additional driver icon is showing

Please help. I don't know much about Ubuntu.

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