Activation Of Network Connection Failed Ubuntu 24.04

On Ubuntu 24.04, “Activation of network connection failed” usually means a Wi-Fi, driver, or router problem.

Seeing “activation of network connection failed ubuntu 24.04” slide across the top of the screen right when you need the internet is frustrating. The desktop still works, your browser just spins, and a short pop-up vanishes before you can read it twice.

The message comes from NetworkManager, the service that handles Wi-Fi and wired links in Ubuntu 24.04. When it cannot bring a connection up cleanly, you see that short error. The good news is that in most cases the cause is simple: a flaky router, a confused driver, or a broken connection profile.

This guide walks through quick checks, step-by-step fixes inside GNOME, driver and kernel checks, router tweaks, and a few command-line tools that help you track down stubborn cases. You can follow it even if you are new to Linux; every command appears exactly as you should type it.

What This Error Means On Ubuntu 24.04

Ubuntu 24.04 relies on NetworkManager to talk to your network cards, manage Wi-Fi passwords, pick an IP address, and keep links alive. When any stage in that chain fails, NetworkManager stops the attempt and shows “Activation of network connection failed”.

On the surface it looks like one error, but the root cause can sit in different places: the router, the driver, the connection profile, or the cable and radio hardware. Reading the message alone rarely tells you which one you are dealing with.

Broadly, most cases fall into a few buckets:

Connection Profile Problems — Old Wi-Fi entries, changed passwords, or wrong security mode settings can stop a link before it gets an IP address.
Driver Or Kernel Mismatch — Wireless chips from vendors such as Realtek sometimes need extra drivers, and updates can break them until a new build lands.
Router Or Modem Trouble — If every device struggles, or only one band drops, the error on Ubuntu is just a symptom of a wider network issue.
Hardware Quirks — Loose Ethernet cables, damaged ports, or power management on laptops can interrupt the link during activation.

The sections that follow help you separate a quick reset from a deeper driver or router issue so you do not waste time in the wrong area.

Quick Checks Before You Change Settings

Before you touch configuration screens, run a few quick checks. These small steps often clear “activation of network connection failed ubuntu 24.04” without any heavy work.

Test Another Device — Try a phone or laptop on the same Wi-Fi or cable to see if the whole network is down or only Ubuntu misbehaves.
Reboot The Router Or Modem — Power it off, wait at least 20–30 seconds, then turn it back on and give it a couple of minutes to settle.
Toggle Airplane Mode — On a laptop, click the system menu in the top-right, turn Airplane Mode on, wait a few seconds, then turn it off and try Wi-Fi again.
Reconnect The Cable — For wired links, unplug the Ethernet cable on both ends, check for damage, then push it back in until it clicks.
Try A Mobile Hotspot — Share your phone’s data over Wi-Fi and connect Ubuntu to that network; if this works while your home router does not, the problem sits near the router.
Restart Ubuntu — A full restart resets drivers and NetworkManager, which can clear temporary glitches after updates or sleep.

If these checks show that only Ubuntu fails while other devices stay online, or the error appears again right after a reboot, move on to deeper fixes inside the desktop.

Fixing Activation Of Network Connection Failed Ubuntu 24.04 Step By Step

This section covers the fixes that solve most cases on a normal Ubuntu 24.04 desktop: resetting the connection profile, restarting NetworkManager, and clearing out broken Wi-Fi entries.

Reset The Connection In GNOME Settings

Start with the simplest approach: turn the connection fully off inside Settings, then back on. This forces NetworkManager to rebuild the link without touching lower-level drivers.

Open Network Settings — Click the system menu in the top-right corner, then click the Wi-Fi or wired icon and choose “Settings”.
Disable The Current Connection — Use the switch next to your Wi-Fi network or wired connection to turn it off.
Wait A Few Seconds — Give the system a moment to drop the link completely.
Turn It Back On — Flip the same switch on again and watch for a stable connection instead of the error.

If the error appears right away, or the connection loops between “connecting” and “activation failed”, remove and recreate the profile.

Recreate The Wi-Fi Or Wired Profile

Ubuntu stores your Wi-Fi password, security mode, and IP settings inside a named connection profile. If that record becomes stale or corrupt, deleting and recreating it often helps.

Forget The Wi-Fi Network — In Network settings, click the gear icon next to your Wi-Fi network, then choose the option to forget or remove it.
Remove Old Wired Profiles — Run nm-connection-editor from the application launcher, select unused Ethernet entries, and delete them.
Reconnect From The Menu — Click the network icon again, pick your Wi-Fi network, enter the password carefully, and let Ubuntu create a fresh profile.
Test Automatic Connection — Reboot once and check whether the system connects without showing the error.

This alone fixes many “Activation of network connection failed” cases that started after a router change, a move to WPA3, or a wrong password saved by accident.

Restart NetworkManager From The Terminal

When the desktop tools still misbehave, restarting the NetworkManager service directly gives you a clean slate without rebooting the machine.

Open A Terminal — Press Ctrl+Alt+T to open a terminal window.
Restart NetworkManager — Run sudo systemctl restart NetworkManager and enter your password when prompted.
Watch The Icon — Keep an eye on the network icon in the top-right as it cycles through disconnect and reconnect.
Try Connecting Again — Use the menu to select your Wi-Fi or wired connection and see whether the error still appears.

If the service fails to restart, or the error shows up during activation after this reset, there is a good chance a driver, kernel, or router detail is getting in the way.

Check Windows Fast Startup On Dual-Boot Systems

On machines that dual-boot Windows and Ubuntu, the Windows “Fast Startup” feature can leave network hardware in a half-hibernated state. Linux then cannot bring the device fully online, which leads to activation failures.

Boot Into Windows — Start your computer into Windows rather than Ubuntu.
Open Power Options — In the classic Control Panel, open “Hardware and Sound”, then “Power Options”.
Disable Fast Startup — Click “Choose what the power buttons do”, then turn off “Turn on fast startup”. Save the changes.
Shut Down Fully — Use “Shut down” instead of restart, then power the machine back on and boot into Ubuntu.

Networks that fail only after a Windows session, but stay stable once Fast Startup is off, often link back to this feature.

Check Drivers And Kernel For Network Issues

If your network adapter does not work at all, or started failing right after a kernel update, drivers need attention. Ubuntu 24.04 ships with many drivers built in, yet some Realtek chips and newer cards still require tuned packages or a newer kernel build.

Threads on Ask Ubuntu and the Ubuntu forums show repeated patterns: Realtek RTL8821CE or RTL8821AE Wi-Fi cards that struggle after updates, and rtw89 or r8125 drivers that need extra steps to stay stable. In those cases, “Activation of network connection failed” is a symptom of a driver that cannot hold the link.

Look For Additional Drivers

The easiest way to check for a vendor driver is through the built-in tool in Ubuntu 24.04.

Open Software & Updates — Search for “Software & Updates” in the application launcher.
Switch To Additional Drivers — Go to the “Additional Drivers” tab and let it scan the system.
Pick A Tested Driver — If a proprietary driver appears for your Wi-Fi or Ethernet card, select it and click “Apply Changes”.
Reboot And Test — Restart Ubuntu and see whether the network connects cleanly.

If no alternative driver shows up, or the suggested one does not help, you may be using the latest kernel where a bug still exists. On the other hand, some users fix problems by updating to the newest kernel available from official Ubuntu packages.

Check Your Network Hardware From The Terminal

A short hardware report helps you confirm which chip you own and which driver it uses. That information matters when you search for fixes or bug reports.

List Network Devices — Run sudo lshw -C network to show wired and wireless adapters along with their drivers.
Check Driver Status — Look for lines such as driver=r8169 or driver=rtw89_* to see which module is active.
Note Firmware Details — Pay attention to firmware strings and driver versions, which can match known bug reports.

If your driver matches one of the common problem cases, watch for updated kernel packages or targeted driver updates through Ubuntu’s regular update system rather than random scripts from the web.

Common Symptoms And Likely Causes

This table links a few common patterns to the area that usually needs attention.

Symptom	Likely Cause	Next Action
Wi-Fi worked before an update, now fails to activate	Kernel or wireless driver bug	Check Additional Drivers, install pending updates, review driver bug reports
Ethernet never comes up on a fresh install	Unsupported or partially supported network chip	Run `sudo lshw -C network`, search for that chip with “Ubuntu 24.04” and driver name
Mobile hotspot works, home router does not	Router configuration or security mode mismatch	Check router security settings, Wi-Fi band, and password, then recreate the profile on Ubuntu

If your situation matches one of these rows, focus your time on that layer instead of random tweaks.

Use Logs And Commands To Pinpoint The Failure

When the desktop gives only a short pop-up, logs show what really happened. A few basic commands go a long way, even if you are not used to the terminal.

Check NetworkManager Logs

NetworkManager writes detailed messages whenever it tries to bring a connection up. Watching those lines during a failure helps you see whether the handshake reached the router, failed DNS, or stalled while asking for an IP address.

Open A Terminal — Press Ctrl+Alt+T.
Follow NetworkManager Logs — Run journalctl -u NetworkManager -f to watch new log lines in real time.
Trigger The Error — In another window, try to connect so the failure appears while logs are scrolling.
Look For Hints — Watch for messages about authentication failures, timeouts, or missing devices.

If you see clear messages such as “authentication failed” or “no suitable device”, you know to focus on passwords, router settings, or drivers instead of random tweaks.

Check Device And IP Status With Nmcli

The nmcli tool gives a compact view of devices and connections, which helps you see whether Ubuntu even sees your card as ready.

List Devices — Run nmcli device to see each network device and its state.
Inspect One Device — Use nmcli device show , replacing with entries like wlp2s0 or enp3s0.
Test Basic Connectivity — Once a link appears “connected”, run ping -c 4 8.8.8.8 and then ping -c 4 ubuntu.com to check both IP and DNS.

If you can ping an IP address but not a website, DNS settings inside the connection profile need review. If pings fail entirely, the link itself never formed, and you are still chasing the original activation failure.

When The Problem Is Your Router Or Wi-Fi Network

Ubuntu often gets blamed when the real problem lives inside the router. Clues include other devices dropping as well, Ubuntu working fine on a mobile hotspot, or the error appearing only on one specific network while others connect instantly.

In some support threads, people report that Ubuntu 24.04 connects to a phone hotspot without issue but shows “Activation of network connection failed” only with a home router. That pattern points strongly at router configuration rather than an Ubuntu bug.

Check Wi-Fi Security And Password

Modern routers offer several Wi-Fi security options, such as WPA2-Personal and WPA3. If NetworkManager expects one mode while the router broadcasts another, activation can fail even if the password looks right.

Open The Router Admin Page — On another device, sign in to the router’s web page using the address and credentials on its label.
Check Wireless Security Mode — Look for Wi-Fi or wireless settings and note whether the router uses WPA2, WPA3, or a mixed mode.
Match The Mode In Ubuntu — In Network settings on Ubuntu, edit the Wi-Fi profile and make sure the security drop-down matches what the router uses.
Reenter The Password — Delete the Wi-Fi profile, reconnect, and type the password again slowly to avoid hidden typos.

If the router offers a mixed WPA2/WPA3 option and older devices struggle, many people have better luck forcing WPA2-only for a while, then raising it again after firmware updates.

Check Bands, Channels, And Interference

Ubuntu 24.04 can connect on both 2.4 GHz and 5 GHz bands, but some adapters behave better on one band than the other. Crowded apartment buildings or thick walls can make higher bands unreliable.

Try Another Band — If your router broadcasts both 2.4 GHz and 5 GHz networks, test each one separately.
Change Wi-Fi Channel — In the router admin page, switch the channel for your band to a less crowded one if that option exists.
Move Closer To The Router — Shorten the distance and reduce obstacles while you test, which cuts down on signal loss.

If Ubuntu connects reliably on one band but not the other, keep using the stable band while you watch for driver or firmware updates from the router vendor.

Prevent Network Activation Errors On Ubuntu 24.04

Once the connection stays stable, a few habits reduce the chance that the “Activation of network connection failed” message returns after the next update or hardware change.

Keep Ubuntu Updated — Use sudo apt update && sudo apt full-upgrade regularly so you receive bug fixes for NetworkManager, drivers, and the kernel.
Use Tested Drivers — Prefer drivers from “Additional Drivers” or official packages over random scripts from search results.
Limit Power Tweaks — On laptops, avoid aggressive power-saving tools that disable Wi-Fi cards too aggressively during sleep.
Back Up Working Profiles — Once everything works, take screenshots of Network settings so you can recreate them quickly after a reinstall.
Keep A Backup Connection Handy — A phone with USB or Wi-Fi tethering can save time when you need internet to fetch new drivers or updates.

If the error ever returns, you now have a short routine: quick hardware checks, a reset of the connection profile, a restart of NetworkManager, and driver or router checks tailored to your hardware. That rhythm turns a vague pop-up into a set of clear steps you can run through with confidence.