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Issuing lspci -vnn gave me this (relevant) output:

08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n
[14e4:4365] (rev 01)

I don't know how to proceed in order to get it working. Help on this is appreciated.

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Are you sure it is BCM43142 and not BCM4312 ? –  To Do Dec 3 '12 at 16:00
Please check here: askubuntu.com/questions/215890/… –  chili555 Dec 3 '12 at 16:01
i tried installing Broadcom Corporation BCM43142 from software center but dint fix at all –  Sonjay Singh Dec 31 '12 at 10:41

1 Answer 1

$ lspci -vvnn | grep 14e4
08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)

download this file: http://jas.gemnetworks.com/debian/pool/main/w/wireless-bcm43142/wireless-bcm43142-dkms_6.20.55.19-1_amd64.deb

sudo apt-get install linux-headers-generic build-essential dkms

navigate to the folder you have saved the downloaded file and run this command.

sudo dpkg -i wireless-bcm43142-dkms_6.20.55.19-1_amd64.deb

i tried this but i was to fix : lo no extension

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Please, edit your own question if you want to add more details. –  Andrea Corbellini Jan 29 '13 at 15:06

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