If your Ubuntu refuses to connect to Wi-Fi, you are not alone. Wireless problems are one of the most common frustrations faced by Linux users. If your Wi-Fi does not appear, or continues to separate or not connect, there are several ways to explore and fix the problem.
These are not the only possible solutions to Wi-Fi problems in Ubuntu, but it is a great starting point. If anything else does not succeed, you may need to search deeper into devices compatibility, kernel updates, or exploring and repairing errors.
Check if UBUNTU recognizes your Wi-Fi adapter
Before setting network settings or installing drivers, check if Ubuntu discover your devices. If you use a built -in wireless card, open and operate the station:
lshw -C network
For Wi-Fi USB transformers, check if Ubuntu discover the device by operating:
lsusb
If your adapter appears in the list but does not work, it is likely that the problem is related to the driver. If it does not appear, ubuntu may not recognize the devices. For USB transformers, separate and re -implement, trying to different USB ports. For interior cards (PCIE, etc.), turn off your computer, open the box carefully (if comfortable), and make sure the card is firmly in its opening.
Restart network services
Networkmanager can solve many communication problems. Open and operate a station:
sudo systemctl restart NetworkManager
Once restarted, try to call Wi-Fi again. If the problem persists, be running your system to apply changes.
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Installing missing Wi-Fi drivers missing
If Ubuntu does not discover the Wi-Fi interior or external transformer, the correct installation programs may fix the problem. Check the presence of operating programs available by operation:
ubuntu-drivers devices
If a driver is inserted, install it using:
sudo apt install firmware-b43-installer
This is intended for Broadcom, but other Wi-Fi cards may require different packages. If you are using a USB Wi-Fi converter, look for your adapter model alongside “Ubuntu Driver” to find the correct installation steps. Some USB transformers require third -party drivers that need to be installed manually.
For example, if your USB adapter uses the REALTEK SIM set, you may need to install additional drivers with:
sudo apt install rtl8821ce-dkms
If Ubuntu still does not recognize your transformer after installing drivers, separate and connect it again or restart your system.
Make sure the Wi-Fi network is not banned
Ubuntu includes a tool called RFKill, which can prevent and cancel the prohibition of wireless devices at the level of the program (soft block) or the level of the hardware (solid block). To check if Wi-Fi is disabled, run:
rfkill list
If the output shows a “soft,” prohibited or “prohibited”, the system prevents the transformer from working. Unblock to run by running:
sudo rfkill unblock wifi
If Wi-Fi’s switching in your system settings is still gray, restart your computer for the change application.
Missing or hidden Wi-Fi networks repair
If your Wi-Fi network does not appear, check the adapter and wipe it properly. Running:
nmcli radio wifi
This will confirm if Wi-Fi is empowered. If it is turned off, restart it with:
nmcli radio wifi on
For USB transformers, separating and connecting the device can force Ubuntu on the RESCAN of networks. If your network is still not appearing, be running your router or approaching excluding signal strength problems.
Slow Wi-Fi Repair or Frequent interruptions
If the Wi-Fi is slow or continues to decrease, the DNS servers can help.
To change the DNS settings for a specific Wi-Fi connection, open the settings, move to Wi-Fi, and click the gear icon next to your connected network. Switch to the IPV4 tab, disable “automatic” within DNS, and enter 8.8.8.8, 8.8.4.4 for Google DNS or 1.1.1.1, 1.0.0.1 for Cloudflare’s DNS. Click “Save”, then separate and reconnect to the changes.
To change DNS at the system level, open the formation file that has been solved in VIM:
sudo vim /etc/systemd/resolved.conf
Go to [Resolve] to divide. You should see a section similar to this:
By default, and DNS = and Rocrecbns = The lines are suspended #This means that it is inactive.
Decode sin by removing # At the beginning of each.
Enter the favorite DNS servers. For example, to use Google DNS and Cloudflare DNS, adjust lines like this:
DNS=8.8.8.8 8.8.4.4
FallbackDNS=1.1.1.1 1.0.0.1
Save and exit from VIM by clicking on ESC and writing : wqAnd hit the entry. Restart the system to apply changes:
sudo systemctl restart systemd-resolved
Check the new DNS settings:
resolvectl status
After making these changes, Ubuntu will constantly use custom DNS settings.
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Network settings
If none of these repairs work, the UBUNTU network settings may help. Old network configurations can be removed and the Networkmanager service can solve continuous communication problems. Running:
sudo rm /etc/NetworkManager/system-connections/*
sudo systemctl restart NetworkManager
This removes all reserved network configurations, so you will need to reconnect Wi-Fi and enter the password again.
Wi-Fi problems on Ubuntu can be frustrated, but most problems have a solution. If the compact Wi-Fi Card or a USB adapter is not recognized, the correct installation of drivers must work. If the Wi-Fi network is banned or not appearing, restarting services or canceling them through the station can help. Slow speeds and communication drops can often be solved by switching DNS servers. With some steps to explore and fix errors, you should be able to restore the UBUNTU system online.