Debian stretch failed to load firmware rtl_nic/rtl8168g-3.fw (-2)

I’m getting this error in Debian stretch during the boot process

[ 26.390311] r8169 0000:03:00.0: firmware: failed to load rtl_nic/rtl8168g-3.fw (-2)

After that I continues the boot and works fine. Is there any firmware or driver missing?

Answers:

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Method 1

After hours of searching on different resources i ended up solving the problem which was caused by a missing of firmware-realtek the realtek driver .

The missing of this firmware can throw different errors prefixed by rtl_nic/
to solve this simply add the official repository Debian firmware-realtek
to your /etc/apt/sources.list by running this command

$ sudo gedit /etc/apt/sources.list

and make sure you are selecting the right Distro

your source.list should look like this:

#realtek firmware
deb http://ftp.de.debian.org/debian stretch main non-free
deb-src  http://ftp.de.debian.org/debian stretch main non-free

After that install realtek firmware

sudo apt-get update
sudo apt-get install firmware-realtek

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0