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sudo apt-get install firmware-b43-installer

Reading package lists... Done

Building dependency tree      

Reading state information... Done

The following packages were automatically installed and are no longer required:

  dkms patch

Use 'apt-get autoremove' to remove them.

The following extra packages will be installed:

  b43-fwcutter

The following NEW packages will be installed:

  b43-fwcutter firmware-b43-installer

0 upgraded, 2 newly installed, 0 to remove and 3 not upgraded.

Need to get 22.8 kB of archives.

After this operation, 120 kB of additional disk space will be used.

Do you want to continue [Y/n]? y

Get:1 http://in.archive.ubuntu.com/ubuntu/ precise/main b43-fwcutter amd64 1:015-9 [19.3 kB]

Get:2 http://in.archive.ubuntu.com/ubuntu/ precise/multiverse firmware-b43-installer all 1:015-9 [3,524 B]

Fetched 22.8 kB in 0s (26.8 kB/s)              

Selecting previously unselected package b43-fwcutter.

(Reading database ... 143495 files and directories currently installed.)

Unpacking b43-fwcutter (from .../b43-fwcutter_1%3a015-9_amd64.deb) ...

Selecting previously unselected package firmware-b43-installer.

Unpacking firmware-b43-installer (from .../firmware-b43-installer_1%3a015-9_all.deb) ...

Processing triggers for man-db ...

Setting up b43-fwcutter (1:015-9) ...

Setting up firmware-b43-installer (1:015-9) ...

No chroot environment found. Starting normal installation

An unsupported BCM4312 Low-Power (LP-PHY) device was found.

Use b43 LP-PHY firmware (firmware-b43-lpphy-installer package) instead.

Aborting.