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Asked: 2024-09-26T12:41:58+05:30 In:

After upgrading from Ubuntu 22.04 to 24.04, I am experiencing issues with my dual monitor setup. The secondary monitor is not being detected at all. Has anyone else faced this problem, and what solutions or troubleshooting steps can be recommended to resolve it?

I recently upgraded from Ubuntu 22.04 to 24.04, and now I’m having this weird issue with my dual monitor setup. Everything was working perfectly before the upgrade, but now my secondary monitor isn’t being detected at all. I’ve tried a bunch of things, but nothing seems to help.

First off, I checked the physical connections – cables seem fine, and I swapped ports just to be sure. I even tried rebooting a few times, but still, no luck. I went into the display settings to see if it just needed to be activated or something, but it doesn’t even show the second monitor there. It’s like my computer doesn’t even know it exists anymore!

I did some digging online and found a few threads where others faced similar issues after upgrading to 24.04. Some suggested messing around with the xrandr tool in the terminal, but I have to admit I’m not super comfortable with command-line stuff. I’m not sure how to use it properly or what commands to run to diagnose or fix this issue.

Has anyone else run into this problem? If so, how did you manage to get your secondary monitor back up and running? I’ve read about rolling back to the previous version of Ubuntu, but that feels like a hassle, and I’d really prefer to stick with the new version if at all possible.

Also, if there are specific things I should check in the settings, please let me know. I’m a bit of a novice with Linux, so step-by-step advice would be super helpful. Or if there are any packages I might need to reinstall or drivers I should check, that would be awesome too.

Thanks in advance for any tips or insights! I really miss having my dual monitors working, and it’s such a pain trying to do everything on one screen!

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    2 Answers



    1. Dual Monitor Issue After Ubuntu Upgrade

      If your secondary monitor is not being detected after upgrading to Ubuntu 24.04, there are several troubleshooting steps you can take. First, verify that your graphics drivers are up to date. Open a terminal and run the command sudo ubuntu-drivers autoinstall to automatically install any additional driver updates that may be necessary. After the installation, reboot your system and check if the monitor is detected in the Display Settings. You can also try resetting your Display Manager settings by logging into a different virtual terminal (Ctrl + Alt + F3) and executing sudo service gdm restart (replace gdm with your Display Manager if you are using a different one such as LightDM or SDDM).

      If the above steps don’t resolve the issue, and you’re open to using xrandr in the terminal, you can check the current status of connected displays. Run xrandr in the terminal to see a list of the connected displays and their statuses. If you see your secondary monitor listed there but it’s disconnected, you can manually turn it on with a command like xrandr --output HDMI-1 --auto (replace HDMI-1 with your monitor’s identified name from the xrandr output). If that still doesn’t work, consider checking the logs for errors. Use the command dmesg | grep -i fail or check /var/log/Xorg.0.log to identify potential issues related to external displays. This process may seem daunting if you’re a novice, but these commands are a key part of diagnosing display issues in Linux.




    2. Dual Monitor Issue with Ubuntu 24.04

      Help with Dual Monitor on Ubuntu 24.04

      Sounds super frustrating! It’s annoying when everything works fine and then just breaks after an update. Here are some steps you can try to get that second monitor back:

      1. Use xrandr to Detect Displays

      Even if you’re not super comfortable with command-line stuff, using xrandr can really help. Here’s a simple way to do it:

      1. Press Ctrl + Alt + T to open a terminal.
      2. Type xrandr and hit Enter. This will show you the connected displays. Look for something like HDMI-1 or DP-1.
      3. If you see your second monitor listed there (but not in settings), note the name of it.
      4. If it’s not there, try the next step.

      2. Force Detect Monitors

      If your second monitor is not showing up, you might try forcing the system to detect it:

      1. In the terminal, type xrandr --auto and press Enter. This command tries to automatically detect connected displays.

      3. Check Display Settings Again

      After using xrandr, go back to your display settings. Sometimes it helps to refresh the settings and see if the monitor appears.

      4. Ensure Drivers are Up to Date

      Make sure your graphics drivers are updated. Depending on your GPU (like NVIDIA or AMD), you can check for additional drivers:

      1. Open the “Software & Updates” application.
      2. Go to the “Additional Drivers” tab.
      3. Install or switch to the recommended driver if available.

      5. Last Resort: Check for Kernel Issues

      If nothing works, sometimes kernel issues can mess things up. You can try booting into a previous kernel:

      1. Reboot your computer.
      2. Hold down the Shift key during boot to get to the GRUB menu.
      3. Select “Advanced options” and choose an older kernel.

      6. Seek More Help

      If all of this still doesn’t work, you could post on forums like AskUbuntu or the Ubuntu forums. Include details about your hardware (GPU model, brand of monitors, etc.) and mention what you’ve already tried.

      Good luck! Hopefully, you’ll have your dual monitors back in no time.


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