[ubuntu] 12.04 intel 5100agn wireless not working

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http://ubuntuforums.org – I have a Lenovo U450p Ideapad. I just upgraded to 12.04 from 10.04. The wireless worked in 10.04. It gets the SSID, but never prompts for the password (WPA2) and in the gui it doesn't show the SSID as the selected "network name". lspci Code: moomba@moombuntu:~$ lspci | grep 'Network' 03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection iwconfig Code: lo        no wireless extensions. wlan0    IEEE 802.11abgn  ESSID:"Boring Wireless Name"          &nb (Hardware)