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Does anybody know how to configure Wi-Fi on a Lenovo ThinkPad s440 with Ubuntu 12.04 LTS?

I can't configure it even with LAN. Wi-Fi is the first thing I need. I can't find any drivers for Linux. As I see it from (official specs link) Ubuntu uses "Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller" to establish network.

Can anybody suggest a solution? A driver, a way to configure Wi-Fi or anything?

$ lspci -nn | grep 0280
04:00.0 Network controller [0280]: Intel Corporation Device [8086:08b2] (rev 73)
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I installed iwlwifi module using instructions from another thread. I just needed to know my Intel 7260 to find this answer.

So, steps (by chili555) are:

I suggest you download this to your desktop: http://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.11-rc3/backports-3.11-rc3-1.tar.bz2 Right-click it and select 'Extract Here.' Now open a terminal and do:

cd Desktop/backports-3.11-rc3-1/
make defconfig-iwlwifi
make
sudo make install

Now download the required firmware here: https://dl.dropboxusercontent.com/u/58267392/iwlwifi-7260-7.ucode.zip Please download it to your desktop. Right-click and select 'Extract Here.' Now open a terminal and do:

sudo cp Desktop/iwlwifi-7260-7.ucode /lib/firmware/
sudo modprobe -r iwldvm  <--If it is not loaded, OK, please proceed
sudo modprobe -r iwlwifi <--If it is not loaded, OK, please proceed
sudo modprobe iwlwifi

UPDATE: Intel wireless 7260 driver crashes, how do I work around it?

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