How to Install a Wi-Fi Driver on Ubuntu: A Step-by-Step Guide

Experiencing no wireless connection immediately after installing Linux is a classic problem that can confuse even an experienced user. Ubuntu It is renowned for its excellent out-of-the-box hardware support, but rare network cards or newer laptop models often require manual installation. firmware or kernel modules. Without a working internet connection, the process seems like a vicious circle: the driver needs the network, and the network needs to download the driver.

Fortunately, there are several proven methods for solving this problem, from using a temporary USB connection to manually compiling modules. In this article, we'll walk you through all the steps of diagnosing and installing the necessary software for your network card. You'll learn how to identify the exact adapter model, find the appropriate packages, and activate them in the system.

The first thing you need to do before starting any manipulations is to make sure that the problem lies in the missing driver and not in a disabled hardware switch. Many laptops have physical keys or combinations of keys. Fn + F-key, which block the module's operation at the BIOS level. Check the indicators on the device's case and ensure that airplane mode is not activated in the system interface, if it is even partially displayed.

Network adapter identification

Before looking for a solution, it's important to know exactly what kind of hardware we're dealing with. Linux has a powerful tool lspci for devices connected via the PCI bus, and lsusb For external or built-in USB adapters, launch the terminal and enter the following command to list all connected PCI devices, filtering out only network controllers.

lspci -nnk | grep -i net -A2

In the output you will see lines containing vendor and device IDs, for example Realtek Semiconductor Co., Ltd. or Intel CorporationPay special attention to the line Kernel driver in use: If it's missing, then the kernel module is indeed not loaded. It's also helpful to check the list of USB devices if your adapter is external, using the command lsusbto see the manufacturer ID.

Write down the device ID, which usually looks like a pair of numbers separated by a colon, such as 8086:31dcThese numbers are the key to finding the correct driver in the repositories or on the manufacturer's website. Knowing the exact chip model (for example, RTL8821CE or BCM43xx), you will be able to find specific instructions, as there is no universal solution for all cards.

• 🔍 Use lspci -v to obtain detailed information about interrupts and device memory.
• 📝 Write down the Vendor ID and Device ID for later searching in the PCI database.
• 💻 Check the output dmesg | grep firmware for microcode loading errors.

⚠️ Note: Some adapters may be detected by the system as an unknown device. In this case, checking the hardware ID against the official documentation from the laptop manufacturer will help avoid installing incompatible software.

Preparing the system and temporary network access

Since Wi-Fi isn't working yet, you'll need an alternative internet connection to download packages. The most reliable method is to use an Android or iOS smartphone in USB tethering mode. Connect your phone to your computer with a cable, enable "USB tethering" in your mobile network settings, and Ubuntu will automatically recognize it as a wired Ethernet connection.

If you don't have the opportunity to use a smartphone, you can download the necessary .deb packages on another computer and transfer them via flash drive. However, this method is less convenient due to possible dependencies, which would also have to be downloaded manually. Therefore, it is recommended to find a way to temporarily extend the internet connection to the problematic machine.

Ensure the repositories are up to date by running the update package lists command. This is a critical step, as older lists may not contain links to the latest versions of drivers or management utilities. In Debian-based distributions, this is done using the utility apt.

sudo apt update && sudo apt upgrade

In parallel, it's worth installing a basic set of compilation tools if you need to build from source. Packages build-essential, dkms and kernel header files linux-headers-generic are the foundation for the successful installation of most proprietary modules. Without them, the installation process will fail at the compilation stage.

Using additional Ubuntu drivers

The easiest and safest way for beginners is to use the built-in driver management utility. Ubuntu scans your hardware and offers to install proprietary modules if they're available in the official repositories. This mostly applies to Broadcom cards and some older NVIDIA models, but it's worth trying first.

Open the application menu and find "Software & Updates." Go to the "Additional Drivers" tab. The system will search for suitable software and, if it finds it, will prompt you to select it from the list. Simply select "Use..." and click "Apply Changes."

The process may take several minutes as the system downloads and installs the necessary components. After successful installation, a reboot or at least a restart of the NetworkManager service will be required. This method is advantageous because the installed packages are signed with Ubuntu digital keys and are guaranteed not to impact system stability.

• 🚀 This method automatically resolves dependency issues.
• 🛡️ Only tested and stable versions of modules are installed.
• 🔄 Driver updates will occur along with the system update.

⚠️ Note: If the Additional Drivers list is empty, this means there is no proprietary driver for your hardware in the Ubuntu repositories. In this case, you will need to install it manually or use DKMS.

Manual installation via DKMS and Git

Modern adapters, especially those from Realtek and MediaTek, often require driver installation via DKMS (Dynamic Kernel Module Support). This allows modules to be automatically rebuilt when the Linux kernel is updated. The process begins with cloning the driver's source code repository from GitHub.

Find the repository that matches your chip model. For example, popular Realtek cards often use repositories from lwfinger or morrownrCopy the repository address and use git to download files to your computer. Make sure you have the package installed. git.

sudo apt install git
git clone https://github.com/username/repository-name.git
cd repository-name

After navigating to the folder with the downloaded files, you need to run the installation script. It is usually called install.sh or dkms-install.shThe script will automatically copy the files to the required directories, register the module in DKMS, and build it for the current kernel. Closely monitor the terminal output for errors.

systemctl status NetworkManager