XIAOMI NoteBook Air 13″: How to activate WiFi on Ubuntu 16.04?

When you want to use Ubuntu 16.04 with the XIAOMI NoteBook air 13″, everything works fine except… The WiFi!

But don’t worry, it is quite simple to get rid of this.

For short readers who just want results right now, just follow these few steps:

  1. Open a terminal
  2. With root access, edit file /etc/modprobe.d/blacklist.conf
  3. At the end of the file, add the line blacklist acer_wmi
  4. Reboot
  5. Et voilà

For people who want to understand what happens here, it is quite simple.

In a terminal, if you write:

$ rfkill list all
0: hci0: Bluetooth
 Soft blocked: yes
 Hard blocked: no
1: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
2: acer-wireless: Wireless LAN
Soft blocked: yes
Hard blocked: no

You could see that your Wireless LAN (In other words, WiFi), is blocked by acer-wireless.

(rfkill is a tool which could tell you which module could block your wireless devices)

Actually, it is the linux module acer_wmi, which is designed to control by software bluetooth, WiFi, screen brightness … which avoid your WiFi to work properly.

A simple way to disable a linux module is to blacklist it, as written in the first part.

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