I have the following wireless network controller:
03:00.0 Network controller : Intel Corporation Centrino Wireless-N 2200 [8086:0891] (rev c4)
Subsystem: Intel Corporation Centrino Wireless-N 2200 BGN [8086:4222]
Kernel driver in use: iwlwifi
It works well on Ubuntu 14.04.1 LTS. But if I want to use a linux-libre as kernel, it fails due to lack of related firmware on linux-libre.
How can I install the firmware?