Connecting to Wi-Fi in Linux Mint: A Complete Guide from Drivers to Diagnostics

Wireless internet has become an integral part of everyday work, but users Linux Mint often encounter problems connecting to Wi-Fi. Unlike Windows or macOS, where drivers for network adapters are usually installed automatically, in distributions based on Linux This process may require manual intervention. This is especially relevant for laptops with modern adapters. Intel AX200/AX210, Realtek RTL8852AE or Broadcom BCM43xx, which often "don't see" the network without additional manipulation.

In this article, we will cover not only the basic methods of connecting to Wi-Fi via a graphical interface Cinnamon/MATE/Xfce, but we will also consider hidden settings, terminal commands, and solutions to the most common errors—from missing networks to constant connection drops. We'll pay special attention to a unique issue with Linux Mint 21.x and kernel modules 5.15+, where adapters on Realtek chips require manual compilation of drivers from source.

If you've just switched from Windows or another OS, don't be scared by terms like iwconfig, dkms or secure boot We'll explain everything in simple terms, with step-by-step screenshots and alternative methods. And for experienced users, we've prepared advanced tips for optimizing connection speed and security.

1. Basic Wi-Fi connection via graphical interface

Let's start with the simplest method, which will work in 80% of cases - if your network adapter is already recognized by the system and does not require additional drivers. Linux Mint (regardless of the shell version - Cinnamon, MATE or Xfce) the connection process is unified:

1. Click the network icon in the lower-right corner of the taskbar (near the clock). If there's no icon, the adapter isn't detected (skip to the driver section).

2. Select the desired network from the drop-down list Wi-Fi.

3. Enter your password (pay attention to the case!) and press Connect.

If the network is secure WPA3, and your adapter only supports WPA2, an authentication error may occur. In this case:

• 🔄 Try temporarily switching your router to offline mode WPA2-PSK (via the router's web interface).
• 🔧 Update your router firmware - many models (TP-Link Archer C6, ASUS RT-AX88U) received support WPA3 in later versions of the software.
• 🖥️ Install the latest drivers for the adapter (instructions in the next section).

After a successful connection, the network icon will change color to blue (in Cinnamon) or a signal strength indicator will appear. To check the connection speed and stability, open a terminal and enter:

ping -c 10 8.8.8.8

If there is packet loss (>5%) or latency (>100ms), the problem may be in router channel overload or incorrect energy saving settings adapter (more on this in the section on optimization).

2. Checking and installing drivers for the Wi-Fi adapter

If the network list is empty or the network icon has a red cross through it, the system most likely didn't recognize your adapter. This is typical for laptops with chips. Broadcom (For example, BCM43142 V MacBook Pro 2013-2015) or Realtek (series RTL8188EE, RTL8723DE). You can check the current status of the adapter using the command:

lspci -knn | grep -iA3 net

In the output, pay attention to the line Kernel driver in use:

• 🆗 If a driver is specified there (for example, iwlwifi For Intel or rtl8192ce For Realtek) — the adapter is recognized, but requires updating.
• ❌ If the line is empty or contains Kernel modules: [none] — the driver is missing.

For most adapters Intel And Atheros The drivers are already included in the kernel Linux, but may require activation. Follow these steps:

sudo modprobe -r [module_name] && sudo modprobe [module_name]

Where [module_name] - this is the value from the string Kernel modules (For example, iwlwifi).

For Broadcom And Realtek Manual installation is often required. The most reliable method is to use driver manager Linux Mint:

1. Open Menu → Administration → Driver Manager.
2. Wait for the scan (may require a cable connection) Ethernet).
3. Select the recommended driver (usually marked with a check mark) and click Apply changes.
4. Reboot the system.

Connect your laptop to the router with an Ethernet cable.

Update the system with the command sudo apt update && sudo apt upgrade -y

Back up your important data

Make sure Secure Boot is disabled in BIOS (if required)

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If the driver manager doesn't find suitable packages, you'll have to install them manually. For adapters Realtek RTL88x2bu (popular in USB dongles) run:

sudo apt install dkms git
git clone https://github.com/cilynx/rtl88x2bu.git
cd rtl88x2bu
chmod +x dkms-install.sh
sudo./dkms-install.sh

⚠️ Attention: After updating the kernel Linux Mint Custom drivers may stop working. To avoid this, use the command sudo dkms autoinstall after each system upgrade.

3. Connecting to hidden networks and networks with enterprise authentication

If your router is configured to hide the SSID (does not broadcast the network name), or you are connecting to a corporate network with WPA2-Enterprise (for example, at a university or office), standard interface Linux Mint may not cope. In such cases, a utility will help nmcli — console network manager.

To connect to hidden network:

nmcli dev wifi connect "NetworkName" password "YourPassword" hidden yes

For networks with enterprise authentication (For example, PEAP/MSCHAPv2):

nmcli con add con-name"UnivWiFi" ifname wlp3s0 type wifi ssid"eduroam"
nmcli con modify UnivWiFi wifi-sec.key-mgmt wpa-eap
nmcli con modify UnivWiFi 802-1x.eap peap
nmcli con modify UnivWiFi 802-1x.phase2-auth mschapv2
nmcli con modify UnivWiFi 802-1x.identity"your_login@domain"
nmcli con modify UnivWiFi 802-1x.password"your_password"
nmcli con up UnivWiFi

Replace wlp3s0 the name of your network interface (you can find it out using the command ip aIf you're unsure of your security settings, check with your network administrator—incorrect settings may block your connection.

If the connection is not established after executing the commands, check the system logs:

journalctl -u NetworkManager --no-pager -n 50

Please note the lines with error or fail - they will point out a specific problem (for example, an invalid certificate for EAP-TLS).

4. Diagnosing Wi-Fi Problems: From Simple to Complex

If Wi-Fi connects but is unstable (drops, low speed, high ping), follow this algorithm:

1. Check your router:
   • 🔄 Reboot the router (turn off the power for 30 seconds).
   • 📶 Change the Wi-Fi channel in your router settings (optimal: 1, 6, or 11 for 2.4 GHz; 36-48 for 5 GHz).
   • 🔒 Disable the Smart Connect feature, as it can force devices to switch between bands.
2. Check the adapter in Linux Mint:
   • 📡 Make sure the adapter is not disabled by a hardware button (relevant for laptops) Lenovo, HP).
   • 🔋 Disable power saving for Wi-Fi: iwconfig wlp3s0 power off.
   • 🔄 Reconnect to the network: nmcli con down"ConnectionName" && nmcli con up"ConnectionName".

sudo iwlist wlp3s0 scanning | grep -E"Cell|Encryption|Quality|Signal"

sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

sudo systemctl restart NetworkManager

nmcli con modify"ConnectionName" 802-11-wireless.band a

nmcli con modify"ConnectionName" 802-11-wireless.band --

iw reg get

sudo iw reg set US

sudo crontab -e

@reboot iwconfig wlp3s0 power off

sudo systemctl stop NetworkManager
sudo systemctl disable NetworkManager

wpa_passphrase"SetName""Password" | sudo tee /etc/wpa_supplicant.conf

sudo wpa_supplicant -B -i wlp3s0 -c /etc/wpa_supplicant.conf
sudo dhclient wlp3s0

sudo apt install iwd

sudo systemctl disable --now NetworkManager wpa_supplicant

sudo systemctl enable --now iwd
sudo iwctl
[iwd]# station wlan0 scan
[iwd]# station wlan0 get-networks
[iwd]# station wlan0 connect"SetName"

sudo systemctl enable --now NetworkManager
sudo systemctl disable --now iwd

rfkill list

sudo rfkill unblock all

sudo dkms autoinstall

echo'deb http://liquorix.net/debian sid main' | sudo tee /etc/apt/sources.list.d/liquorix.list
sudo apt update && sudo apt install liquorix-kernel

iw list | grep -A 10"Supported frequencies"

auto wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant.conf

sudo rm -rf /etc/NetworkManager/system-connections/*