For a general solution,
apt-file is your way to solve the
Possible missing firmware... warning. E.g.:
apt-file search bxt_dmc firmware-misc-nonfree: /lib/firmware/i915/bxt_dmc_ver1.bin firmware-misc-nonfree: /lib/firmware/i915/bxt_dmc_ver1_07.bin
Showing that the package
firmware-misc-nonfree provides the missing firmware.
firmware-linux package solves the problem because
firmware-linux depends on
firmware-linux-nonfree which depends on
non-free to your
deb http://deb.debian.org/debian buster main contrib non-free deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free deb http://deb.debian.org/debian buster-updates main contrib non-free
sudo apt update sudo apt install apt-file sudo apt-file update
It appears the answer was the whole time in front of my eyes.
I have finally found the right package:
firmware-linux, which installs all the missing firmware. Install it with:
sudo apt-get install firmware-linux
Those warnings might be gone afterward.
you can download them from here
and copy downloaded files to this path :
update-initramfs -u -k all
sudo apt-get update -y)