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I did a clean install of 12.10 and the system detected Broadcom wireless driver and even connected to my wireless and did an update.

But when I reboot there is no wireless and no ethernet. Even when I connect using ethernet the "Wired network" is greyed and shows as disconnected.

There is no Wireless network in the applet.

I am unable to connect to internet or even to local network. Quite lost now!

share|improve this question
Welcome to Ask Ubuntu! What exact wireless and ethernet controller do you have? Please include the output of lspci -nnk | grep -iEA3 "(network|ethernet|wireless|broadcom)" in your question (edit it). This is very likely to be one of the many possible duplicates - but we'll need the exact numbers. – gertvdijk Feb 6 '13 at 12:53
Basically, these are just bugs and should never happen with regular updates. For 14e4:4727 see this solution. For BCM43224 see this solution, etc. (see why we need the exact information?) – gertvdijk Feb 6 '13 at 12:59
ethernet - Realtek RTL8101E/RTL8102E; wireless: BCM4312 – eshwar Feb 6 '13 at 13:30
Please include the exact information as outputted by the command I listed. Yours just list the "user friendly" names - we need numerical vendor/product id's to be sure. And please edit your question to provide additional information. It's how this Q&A site works (it's not a discussion forum) – gertvdijk Feb 6 '13 at 13:35
I am sorry about this. I can't connect to internet without the ethernet and wireless and typing all the details is a hassle for me. I formatted and installed 12.04 and everything works fine. I am going to continue with this. Thanks for your help. – eshwar Feb 10 '13 at 6:29

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