No wifi adapter found debian

How do I detect and install a Wifi adapter in Debian?

I’ve recently imaged a laptop with a Debian 5.0, and it doesn’t appear to be detecting the wifi adapter. The image was originally from a different laptop, so maybe this is part of the problem. How do I install the drivers for the card? Furthermore, I’m not even sure what the adapter model is (all I know is that the previous Windows XP install used Intel wifi drivers), so is there a way to find out the chipset model number? Also to make matters worse, there’s no model number on the case — other than «Phillips Freevents».

4 Answers 4

To know what driver to look for here is a simple way:

• If the card is PCI, run lspci in a shell and look for the closest thing.
• In case the card is USB, run lsusb .

There are far too many possibilities to cover in a simple answer here. I would suggest you start by reading http://wiki.debian.org/WiFi

Do you have any network access? Usually the any built-in LAN adapter should work fine.

If you get that working it should be rather simple to «apt-get update» and install the stock kernel and wifi firmware (often missing) shipped with Debian 5.0.

But schwert is right, in any case you need to figure out what kind of make/model your card is. Also, it might be easier to simply reinstall the laptop. And unless you really know Debian you might be better off installing Ubuntu on it. They ship wifi firmware and have quite helpful HW guides should anything go wrong.

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[Networking] WiFi adapter not found on Debian 11 — Help!

[Networking] WiFi adapter not found on Debian 11 — Help!

#1 Post by Kailinho » 2022-12-24 01:32

Hi all, I’m new to Debian and have been trying to get WiFi to work. However, after many attempts, nothing seems to have changed; the WiFi symbol is not in the system tray, and clicking the WiFi section in settings shows «No Wi-Fi Adapter Found; Make sure you have a Wi-Fi adapter plugged and turned on.»

I installed Debian 11.6.0 nonfree DVD ISO from here.
The desktop environment I’m using is GNOME.
The kernel version is 5.10.0-20-amd64.
My WiFi card is Intel WiFi 6 AX201 according to Windows Device Manager (AX201 is already supported as of kernel 5.2 I believe).
Output of lspci:

00:00.0 Host bridge: Intel Corporation Device 4601 (rev 04)
00:02.0 VGA compatible controller: Intel Corporation Device 46a8 (rev 0c)
00:04.0 Signal processing controller: Intel Corporation Device 461d (rev 04)
00:06.0 PCI bridge: Intel Corporation Device 464d (rev 04)
00:07.0 PCI bridge: Intel Corporation Device 466e (rev 04)
00:08.0 System peripheral: Intel Corporation Device 464f (rev 04)
00:0d.0 USB controller: Intel Corporation Device 461e (rev 04)
00:0d.2 USB controller: Intel Corporation Device 463e (rev 04)
00:14.0 USB controller: Intel Corporation Device 51ed (rev 01)
00:14.2 RAM memory: Intel Corporation Device 51ef (rev 01)
00:14.3 Network controller: Intel Corporation Device 51f0 (rev 01)
00:15.0 Serial bus controller [0c80]: Intel Corporation Device 51e8 (rev 01)
00:15.2 Serial bus controller [0c80]: Intel Corporation Device 51ea (rev 01)
00:15.3 Serial bus controller [0c80]: Intel Corporation Device 51eb (rev 01)
00:16.0 Communication controller: Intel Corporation Device 51e0 (rev 01)
00:1d.0 PCI bridge: Intel Corporation Device 51b1 (rev 01)
00:1f.0 ISA bridge: Intel Corporation Device 5182 (rev 01)
00:1f.3 Audio device: Intel Corporation Device 51c8 (rev 01)
00:1f.4 SMBus: Intel Corporation Device 51a3 (rev 01)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device 51a4 (rev 01)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (16) I219-V (rev 01)
01:00.0 Non-Volatile memory controller: Sandisk Corp Device 5008 (rev 01)
2b:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)

deb http://deb.debian.org/debian bullseye main contrib non-free deb-src http://deb.debian.org/debian bullseye main contrib non-free

sudo apt install firmware-iwlwifi

modprobe -r iwlwifi ; modprobe iwlwifi

in accordance with the instructions from the iwlwifi page.

I also downloaded firmware for AX201 from Intel’s firmware page, then copied the 4 .ucode files inside to /lib/firmware. I also tried downloading the most recent versions of those .ucode files from the firmware git tree and copied those again to /lib/firmware. I have rebooted after all of those steps but they seem to have no effect—still no WiFi in system tray, no adapter found. Only Ethernet cable works.

Any help for how to proceed would be much appreciated!

sunrat Administrator
Posts: 5543 Joined: 2006-08-29 09:12 Location: Melbourne, Australia Has thanked: 89 times Been thanked: 305 times

Re: [Networking] WiFi adapter not found on Debian 11 — Help!

#2 Post by sunrat » 2022-12-24 03:48

“ computer users can be divided into 2 categories:
Those who have lost data
. and those who have not lost data YET ” Remember to BACKUP!

Re: [Networking] WiFi adapter not found on Debian 11 — Help!

#3 Post by fmontiel » 2023-03-08 17:46

Could you solve this issue? I have the exact same issue.

I’m trying to install Debian 11 on my laptop (Dell Inspiron 15 3520 with Intel(R) Wi-Fi 6 AX201 (2×2) Wi-Fi + Bluetooth), but as you mentioned, Wifi adapter is not found. On Windows 11 on the same laptop, I have wifi working.

I tried installing Debian 11 from non-free image, and after that, I installed following packaged:

Anyone with the same issue?

FreewheelinFrank Global Moderator
Posts: 1615 Joined: 2010-06-07 16:59 Has thanked: 23 times Been thanked: 143 times

Re: [Networking] WiFi adapter not found on Debian 11 — Help!

#4 Post by FreewheelinFrank » 2023-03-08 18:12

fmontiel wrote: ↑ 2023-03-08 17:46 Hi @Kailinho.

Could you solve this issue? I have the exact same issue.

I’m trying to install Debian 11 on my laptop (Dell Inspiron 15 3520 with Intel(R) Wi-Fi 6 AX201 (2×2) Wi-Fi + Bluetooth), but as you mentioned, Wifi adapter is not found. On Windows 11 on the same laptop, I have wifi working.

I tried installing Debian 11 from non-free image, and after that, I installed following packaged:

Anyone with the same issue?

Please do not post the same question in multiple topics, aka cross post. Also please start a new topic for your issue even if it appears to be the same, because details may differ, and it can create confusion.

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How to Enable WiFi in Debian 11 Bullseye, Fix Missing wlan0

Are you looking for a way to fix no Wi-Fi problem on Debian? If yes, then you have landed on the right page. In this tutorial, I will share a straightforward method that you can apply to fix the missing Wi-Fi adapter issue on Debian.

If you just did a fresh Debian install on a PC, then you will most likely run into an issue where you can’t access Wi-Fi. Debian will not even show you wlan0 device if you run ip addr show the command.

This happens because the Debian ISO doesn’t include the Wi-Fi firmware by default. Thus, you have to manually install the firmware from a non-free repo in order to use the Wi-Fi facility.

Depending on the network card manufacturer of your computer, you have to install the correct firmware. If you are using a laptop of popular brands such as Lenovo, Acer, Samsung or Asus, which usually use Atheros network card, it could be a little daunting to find the right version of the firmware to install.

I ran into this issue a little while ago and couldn’t find a quick solution so I thought maybe share the fix, so others do not have to face what I went through. Let’s cut to the chase and see the steps involved:

1. First, identify the manufacturer of your Wi-Fi network card.
2. Install the firmware matching your network card manufacturer.

See how to complete these two steps below.

Step 1: Identifying Wi-Fi Network Card Manufacturer on Debian

There is a CLI utility called lshw which can help you identify all the hardware installed on your computer, including the network card. A very good chance is that it will be pre-installed. If not, then you will have to install it by connecting your PC to an Ethernet connection. You can use your Android phone as an Ethernet device via USB tethering.

Install lshw like this:

sudo apt install lshw

It is now time to use lshw to find out the network card vendor. Run the command below and wait for it to generate the HTML report.

lshw -html > lsh.html

Open the generated HTML report(lsh.html) in the browser and search for network or network controller. You will find the result something like this:

From this screenshot, it is now evident that the vendor of my network card is Atheros! But it can also be Intel. It all depends on the PC/laptop manufacturer. Never mind, it doesn’t matter because, firmware for both these cards available for Debian. See in next section, how to install it.

Step 2: Installing firmware matching your network card manufacturer on Debian.

In the last step, you will know what network card is installed on your system. So, based on what card it is, you need to install the correct firmware.

For Atheros Card:

On my Lenovo Ideapad 300-15ISK, it was Atheros card, as evident from the snapshots above.

So, to install the firmware for Atheros, you issue the following command.

sudo apt install firmware-atheros

After the firmware installs, you can try restarting your computer. You will now see that it will detect the available Wi-Fi networks nearby.

Alternatively, you can download the DEB file for the same firmware on some other device, transfer to the Debian PC, and manually install it.

After getting the DEB file, you open the terminal in the Downloads directory and issue this command.

sudo dpkg -i firmware-atheros*

After it completes, successfully, you will have both; wla0 will start showing along with the Wi-Fi network.

For Intel Card:

To install the firmware for Intel network controller, you issue the following command.

sudo apt install firmware-iwlwifi

After it installs successfully, restart your computer. You will now see that it will detect nearby Wi-Fi networks.

Alternatively, you also download the DEB file for the same firmware on some other device, transfer to the Debian PC, and install it manually.

Find and get Intel Wireless firmware here: firmware-iwlwifi (20210315-3) [non-free]

After getting the DEB file, you open the terminal in the Downloads directory and issue this command.

sudo dpkg -i firmware-iwlwifi*

After it completes, successfully, you will have both; wlan0 will start showing along with the Wi-Fi network.

These are the only two steps you have to perform. If you follow them correctly, I am sure you will get Wi-Fi access on Debian in easy way. Although, I hope that they make this process a bit smoother by restoring these back to the installation ISO.

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