Hello, as you can see, I have both firmware packages installed:
$ dpkg-query --show | grep firmware- firmware-iwlwifi 20190717-2 firmware-linux-free 20200122-1 firmware-misc-nonfree 20190717-2 firmware-realtek 20190717-2 Non-free repositories are also enabled in /etc/apt/sources.list > Hi, > > Try below procedure to resolve warnings > > open this file: > sudo vim /etc/apt/source.list > > deb http://deb.debian.org/debian/ stretch main > Add as shown below > deb http://deb.debian.org/debian/ stretch main non-free contrib > > sudo apt-get update > sudo apt-get install firmware-linux-nonfree > sudo apt-get install firmware-iwlwifi -- Alexander Kernozhitsky
