ubuntu 12.04 wireless problem

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http://askubuntu.com – I am using HP Compaq 6735b and i have recently installed Ubuntu 12.04. But now I am having problems with wireless connection. Its not showing any wireless network. The additional driver also does not show any driver to install. lshw -C network gives the following result. It does'nt even show the wireless card. him@him-HP-Compaq-6735b:~$ lshw -C network WARNING: you should run this program as super-user. *-network description: Ethernet interface product: NetLink BCM5787M Gigabit Ethernet PCI Express vendor: Broadcom Corporation physical id: 0 (HowTos)