[ubuntu] dell latitude 4300 wired and wireless not working after 12.04 upgrade

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http://ubuntuforums.org – Hello, I upgrade to 12.04 a few weeks and then had to reinstall the drivers to get it to work. I installed the latest software updates now both my wired and wireless networking is completely hosed. The wired networking is detected but there seems to be not activity. I tried to purge and reinstall the wireless broadcom drivers now am completely hosed. Appreciate any help .. Thanks Karthik (Hardware)