Debian wifi firmware missing

Wi-Fi Network Device Not Ready (firmware missing)

I have installed Debian 9 Stretch on my PC. I cannot connect to the Wi-Fi because it says that a firmware is missing. I didn’t have this problem when I have Lubuntu installed. It was looking for brcm/bcm43xx-0.fw during installation and I skipped this part.

I have found this on the web and I am not sure what exactly I should do. packages.debian.org/stretch/firmware-brcm80211

2 Answers 2

You’ve correctly identified the required firmware-brcm80211 package. But Debian is stricter about the principles of free software than Ubuntu, and so the firmware is in the «non-free» section of the Debian package repository. This section may not be enabled on your system by default, unless you had the foresight to specifically choose it during installation.

In /etc/apt/sources.list , there will be one or more lines like this:

If that file is empty, there can be other repository configuration files in /etc/apt/sources.list.d/ directory.

Typically, the might include just main by default. You’ll want to change it to at least main non-free .

After that, you should run apt-get update and then apt-get install firmware-brcm80211 . Then either unload+reload the kernel module of your Wi-Fi interface, or simply reboot.

I gave up. I just reinstalled Lubuntu. Debian is just not for me. Lubuntu works out of the box without getting any problems. But thanks for the help. It is very much appreciated.

I cannot connect to the Wi-Fi because it says that a firmware is missing. I didn’t have this problem when I have Lubuntu installed.

The BCMxxx wifi card use a non-free firmware and the official debian image do not include the non-free software , using the official image you can load the missing firmware from a formatted fat32 USB device after extraction the firmware from here (exactly firmware-brcm80211)

You have skipped this steps during the system install , you can get the wifi working following the answer of telecoM through the firmware-brcm80211 package or following the debian docs by installing the broadcom-sta-dkms then loading the non-free module wl .

You don’t have a problem using Lubuntu because it include the non-free firmware.

A non official debian image including the non-free software is available to get the wifi working during the system install.

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Missing wifi firmware for Debian

When you install Debian on your desktop or laptop with a .iso file, there is always a problem that Debian can’t recognize wifi signals around you.

Cause

It’s because Debian doesn’t provide some of the necessary firmware along with .iso file for free(Those can be installed later once the installation has been done). The problem doesn’t happen when you install on your virtual machine, because the host machine(no matter which operating system you are using) may have its own wifi firmware already.

Solution

You need to install it on your own. There are two options to choose from depending on a wireless LAN module your machine uses. One is Broadcom’s module, and the other is one of the Intel Centrino Advanced-N series.

Check LAN Module

sudo apt-get install lshw sudo lshw -short | grep network 

My laptop uses Intel’s module.

/0/100/19 enp0s25 network 82579LM Gigabit Network Connection /0/100/1c.1/0 wlp3s0 network Centrino Advanced-N 6205 [Taylor Peak] 

Option1. Installation iwlwifi for Intel’s module

Because It is non-free software, correct /etc/apt/sources.list file as below.

- deb http://ftp.kaist.ac.kr/debian/ buster main #delete + deb http://ftp.kaist.ac.kr/debian/ buster main non-free #append deb-src http://ftp.kaist.ac.kr/debian/ buster main deb http://security.debian.org/debian-security buster/updates main contrib deb-src http://security.debian.org/debian-security buster/updates main contrib 

sudo apt-get install firmware-iwlwifi 

Reboot to load the firmware.

Restore the /etc/apt/sources.list file

+ deb http://ftp.kaist.ac.kr/debian/ buster main #append - deb http://ftp.kaist.ac.kr/debian/ buster main non-free #delete deb-src http://ftp.kaist.ac.kr/debian/ buster main deb http://security.debian.org/debian-security buster/updates main contrib deb-src http://security.debian.org/debian-security buster/updates main contrib 

Check whether the installation was successful

After rebooting it, check if iwlwifi module has been loaded.

lsmod | grep iwlwifi iwlwifi 249856 1 iwldvm cfg80211 774144 3 iwldvm,iwlwifi,mac80211 

If it was successful, you can see there is a wireless module(wlp*) with ip addr command as well.

Option2. Installation Broadcom’s firmware

If your machine uses Broadcom’s wireless module, you need to follow these steps.

Download the firmware on a USB

First of all, download it on your USB, and plug it into your machine, and go through below.

Create a firmware directory.

Unzip the firmware file in /lib/firmware

sudo tar xvf /mnt/usb/2480236-Broadcom_Firmware.tar.gz -C /lib/firmware 

The last step is to reboot. It will be loaded on kernel when reboot.

Check whether the installation was successful

You can check it with lsmod | grep b43 command

lsmod | grep b43 b43 454656 0 bcma 61440 1 b43 mac80211 827392 1 b43 cfg80211 774144 2 b43,mac80211 rng_core 16384 1 b43 ssb 81920 1 b43 mmc_core 172032 2 b43,ssb 

Updated: November 7, 2020

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Missing non-free firmware during Debian installation

Some of your hardware needs non-free firmware files to operate. The firmware can be loaded from removable media, such as a USB stick or floppy. The missing firmware files are: iwlwifi-3160-17.ucode. If you have media available now, insert it, and continue.

I’ve tried with Debian official image writing in ISO format as well as in DD format. I’ve added a necessary iwlwifi-3160-17.ucode file to the root of bootable device, but still no success, this file seems to be not visible to the installer. On debian wiki I’ve found

In some cases, firmware supplied on removable media may not be detected automatically (e.g. 740503). In these situations, drop to the console (Ctrl+alt+F2) and manually mount(8) your removable storage on a temporary directory (e.g. /media).

3 Answers 3

Debian does not ship non-free firmware in its official distribution.

Use one of these images instead.

You specifically mention iwlwifi-3160-17.ucode isn’t installed by your nonfree image.

I can see package firmware-iwlwifi version 20110315-3 in non-free contains this file. If you can get a terminal while running the non-free image, use this to find the package in your installation medium and install it:

dpkg -i $(find / -name firmware-iwlwifi*deb) 

If you can’t find this package, then consider downloading it directly, putting it on a USB, mounting that USB, then dpkg -i firmware-iwlwifi*deb from the USB.

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Debian User Forums

[SOLVED] Debian 11.4 Iwlwifi 8265 Firmware missing

[SOLVED] Debian 11.4 Iwlwifi 8265 Firmware missing

#1 Post by DebianNovice » 2022-08-29 06:51

Hello,
For Context : I thought of removing windows and changing my laptop into a linux device. I chose Debian as my OS because I had a bad experience with Ubuntu Dual Boot.
My laptop is HP ProBook x360 440 G1 that I got from my college.

Problem I tried downloading Debian directly from the official source as the netiso , turns out it doesn’t have the non free firmware that is required.
I have attached the image so that you guys can see what the issue is
I also tried downloading the iso from cdimage http://cdimage.debian.org/mirror/cdimag . 4/iso-dvd/ but it doesn’t also seem to help
First came the no ethernet card detected option , I got the choice to choose iwlwifi but when I was clicking it , the installer was looping back to the options again and again instead of proceeding forward
I tried detecting networking hardware again then the original issue came and now I am stuck with it.
I don’t have cable so Wifi is my only option.

Head_on_a_Stick Posts: 13942 Joined: 2014-06-01 17:46 Location: /dev/chair Has thanked: 53 times Been thanked: 82 times

Re: Debian 11.4 Iwlwifi 8265 Firmware missing

#2 Post by Head_on_a_Stick » 2022-08-29 10:11

The non-free image should work. Can you connect in the live environment?

Did you try clicking on «No» then «Continue» on the above screen? I seem to recall similar errors being reported but the connection worked fine afterwards.

Il semble que la perfection soit atteinte non quand il n’y a plus rien à ajouter, mais quand il n’y a plus rien à retrancher.

Re: Debian 11.4 Iwlwifi 8265 Firmware missing

#3 Post by L_V » 2022-08-29 11:07

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