Les tutos de Pisto

En bref :

nano /etc/apt/sources.list
#Ajouter "non-free" à la fin des lignes
maj
agi firmware-linux-nonfree
maj

The default installation of Debian doesn’t include proprietary packages or drivers. So after a fresh install, you may experience a lack of hardware functionality because non-free firmware isn’t installed. It can however be changed, here’s how :
Editer la Debian repository list pour ajouter le mot « non-free » à la fin de chaque ligne

sudo nano /etc/apt/sources.list

Then update :

sudo apt-get update

Now, the installation of non-free drivers/blobs will be supported. To install such firmware blobs :

sudo apt-get install firmware-linux-nonfree

Reboot to apply the changes.

All done.