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Asked: 2024-09-25T16:22:08+05:30 In:

I’m experiencing problems with the brightness control on my laptop after upgrading to Ubuntu 24.04. Has anyone else faced similar issues, and are there any recommended solutions or fixes?

So, I recently upgraded my laptop to Ubuntu 24.04, and now I’m facing this really annoying problem with the brightness control. Before the update, everything was smooth sailing, and I could adjust the brightness with no issues whatsoever. But now? It’s like the function keys for brightness don’t even want to cooperate!

I’ve tried adjusting the brightness through the settings menu, as well as using the keyboard shortcuts, but nothing seems to work. The screen just stays as is, way too bright for my eyes during late-night work sessions or way too dim when I’m trying to read something in bright sunlight. It’s really frustrating!

I’ve done a bit of digging online, and it seems like I’m not the only one facing this issue. I came across some forums where others have shared their experiences after upgrading, and they mentioned similar problems. Apparently, some people have managed to find workarounds, while others are still struggling just like me.

One person mentioned something about needing to update their graphics drivers, but I’m a bit hesitant to mess around with that since I’m not exactly a tech wizard. Then there was another suggestion about modifying some config files, but that sounds scary and risky to me. I’m totally worried about screwing something up and ending up in a worse situation!

I’m really hoping to hear from anyone who has dealt with this before. Have you found any quick and easy fixes that don’t require diving deep into technical jargon? Maybe there’s a simple terminal command I can try or a setting I’ve overlooked. I just want to get my brightness control back to normal without turning my laptop into a science project.

Your input would be super helpful! I really appreciate any advice or pointers you could share, especially if you’ve dealt with this and found a successful solution. Thanks in advance, everyone!

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    2 Answers


    1. Sounds super frustrating! I totally get the brightness battle after an upgrade—it can be the worst. Here are a few things you might want to try that don’t require a deep dive into tech stuff:

      1. Check Keyboard Shortcuts

      Sometimes the keyboard shortcuts might not be set up right. Go to your “Settings” > “Keyboard” > “Shortcuts” and make sure the brightness controls are assigned. You can change them if needed!

      2. Update Your System

      Running updates can help fix a lot of issues. Just open a terminal (you can find it in your apps, or press Ctrl + Alt + T) and run:

            sudo apt update
      sudo apt upgrade

      3. Graphics Drivers

      Yeah, the graphics drivers thing is a common fix. If you’re nervous about it, you can check “Software & Updates” > “Additional Drivers” to see if there’s a recommended driver for your hardware. It usually takes care of itself!

      4. Edit GRUB Configuration (if you’re feeling brave)

      This one is a bit more technical, but here’s what you can do:

      1. Open a terminal and run sudo nano /etc/default/grub
      2. Find the line that says GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
      3. Add acpi_backlight=vendor after “splash” so it looks like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
      4. Save and exit (Ctrl + X, then Y, then Enter)
      5. Then update GRUB with sudo update-grub
      6. Restart your laptop!

      5. Brightness Indicator Tools

      If you’re still having trouble, there are third-party apps like “Brightness Controller” or “Xbacklight” that let you control brightness from a GUI or terminal. Definitely worth checking out!

      Hopefully, one of these tips helps you out! If you need more help, don’t hesitate to ask. Good luck!



    2. It sounds like you’re dealing with a common issue that some users encounter after upgrading to Ubuntu 24.04, especially regarding brightness control. First, consider checking your system settings to ensure that your graphics drivers are up to date. You can open a terminal and run the command sudo apt update && sudo apt upgrade to update your packages, or you may want to specifically check for drivers using sudo ubuntu-drivers devices to see if proprietary drivers are available for your graphics card. If you find recommended drivers, you can install them with sudo ubuntu-drivers autoinstall. After any updates, reboot your laptop to see if the brightness control issue resolves itself.

      If updating drivers doesn’t help, you might explore other potential fixes without delving too deeply into technical configurations. A common workaround involves adding a boot parameter. To do this, edit the GRUB configuration by running sudo nano /etc/default/grub in the terminal, and then look for the line beginning with GRUB_CMDLINE_LINUX_DEFAULT. Append acpi_backlight=vendor (or try acpi_backlight=video if that doesn’t work) within the quotes. Afterwards, save changes (Ctrl + O, then Enter) and exit (Ctrl + X), and then update GRUB with sudo update-grub followed by a reboot. This may help restore your brightness functionality without requiring extensive troubleshooting or riskier modifications.


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