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Asked: 2024-09-27T06:38:17+05:30 In:

How can I prevent my Ethernet connection from automatically reconnecting in Ubuntu?

I’ve been wrestling with this Ethernet connection issue on my Ubuntu machine that’s driving me a bit crazy. No matter what I do, it keeps reconnecting automatically, which really disrupts my workflow. Like, I’ll be in the middle of something important, and boom—my connection drops and then reconnects within seconds. It’s not a huge amount of time, but for someone like me who relies heavily on a stable connection for programming and online meetings, it’s super frustrating.

So, I’ve been trying to figure out how to stop this automatic reconnection nonsense. I’ve heard that sometimes it’s related to the network manager settings, but I can’t for the life of me figure out what exactly I need to change. I’ve also read about manually configuring some files in the terminal, but that sounds a bit intimidating, and I’m worried about messing something up and making it worse.

There are times when I’ve thought about just disabling the Ethernet altogether and switching to Wi-Fi, but that’s not really a solid option for me because Wi-Fi in my place can be spotty at best. I really need that wired connection to be rock-solid. I’ve already checked the cable and the router, and everything seems fine on that front. It’s just this weird software hiccup I’m dealing with.

Has anyone else run into this? What did you do to fix it? I’d love to hear about any tweaks you made or settings you changed to get your Ethernet to stay stable. It would be awesome to get some advice on this because I really don’t want to keep dealing with this annoying issue. If you could share any relevant steps or links to helpful guides, I’d really appreciate it!

Thanks for any help you can offer. I’m at my wits’ end here, and I just want to be able to work without worrying about my connection dropping every few minutes.

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    2 Answers






    1. Ethernet Connection Issues on Ubuntu


      Dealing with Ethernet Connection Issues on Ubuntu

      It sounds super frustrating to have your Ethernet connection dropping like that! You’re definitely not alone in this. A lot of folks have dealt with similar issues on Ubuntu. Here are some things you can try to stabilize your connection:

      1. Check Network Manager Settings

      Sometimes, the Network Manager settings can cause those reconnects. You might want to look at the following:

      • Open the terminal and type nm-connection-editor to access the Network Connections.
      • Select your Ethernet connection from the list and click on Edit.
      • Check if Automatically connect is enabled. If it is, try disabling it to see if that helps.

      2. Disable IPv6

      Disabling IPv6 can help with connection stability too. Here’s how to do it:

      sudo nano /etc/sysctl.conf

      Then, add these lines at the end of the file:

      net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

      After editing, save and exit (Ctrl+X, then Y and Enter). Then run:

      sudo sysctl -p

      3. Update Drivers

      Make sure your network drivers are up to date. Run these commands to update your system:

      sudo apt update
sudo apt upgrade

      4. Check Power Management Settings

      Power management settings can sometimes cause the Ethernet connection to drop. To disable power management, type:

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

      Change the line:

      wifi.powersave = 3

      to

      wifi.powersave = 2

      Save and exit, then restart your network manager:

      sudo service network-manager restart

      5. Static IP Configuration

      You can also try configuring a static IP address for your Ethernet connection:

      • Open the terminal and again use nm-connection-editor.
      • Edit your connection and go to the IPv4 Settings tab.
      • Change the method to Manual and fill in your desired IP, Netmask, and Gateway. (You might need your router’s details for this.)

      After making these changes, restart your machine and see if that stabilizes your connection. If you still have issues after trying these things, it might help to post in forums or communities specific to Ubuntu, where a lot of users share their experiences and solutions.



    2. If your Ethernet connection on Ubuntu keeps reconnecting, it might indeed be related to the Network Manager settings. One common solution is to adjust the connection settings by accessing the Network Manager interface. You can do this by clicking on the network icon in the system tray, selecting the ‘Wired Connection’ section, and then editing your active connection. Look for options such as ‘IPv4 Settings’ and ‘IPv6 Settings’; ensure that they are set appropriately for your network environment (e.g., setting to ‘Automatic’ for DHCP). Additionally, consider setting the connection priority by ensuring that your connection is at the top of the list in the ‘Connections’ tab, which could help maintain stability during fluctuating network conditions.

      If adjusting these settings does not resolve the issue, you might try updating your network drivers. You can do this through the terminal by using commands like sudo apt update and sudo apt upgrade to ensure all packages are up-to-date. Another potential fix involves modifying the network configuration file directly. You can use the command sudo nano /etc/network/interfaces and specify settings for your Ethernet interface to disable automatic reconnection, if desired. However, proceed with caution when altering system files; it’s always a good idea to back up existing configurations before making changes. If these steps do not solve the issue, consider investigating logs for networking errors using the command dmesg or journalctl -u NetworkManager.service. This can help identify specific problems causing the interruptions.


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