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Thread: keyboard back light wont turn on 24.04

  1. #1
    Join Date
    May 2024
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    2

    keyboard back light wont turn on 24.04

    running Ubuntu 24.04 no partition
    laptop is dell latitude 5490
    Intel Core i5-8350U Quad Core CPU @ 1.9 Ghz
    16 GB RAM (DDR4 @ 2400Mhz)
    ok! so i went through several iterations of Ubuntu very briefly before settlin on 24.04 and they all had their own quirks. But the keyboard back light turned on in the version up to 23.10 but when i upgraded to 24.04 it stopped working and because 24.04 is relatively new there arent a lot articles about this issue on this specific iteration of Ubuntu.

    to be clear, the back light works. it turns on when i power down the laptop. I'm aware that this has happened to other people on previous versions of Ubuntu but im still new to Ubuntu and i dont know if the code fixes for those versions of Ubuntu will work for this version of Ubuntu

  2. #2
    Join Date
    May 2010
    Beans
    3,348

    Re: keyboard back light wont turn on 24.04

    What does "no partition" mean in this context please?

  3. #3
    Join Date
    May 2010
    Beans
    3,348

    Re: keyboard back light wont turn on 24.04

    If you run:
    Code:
    echo 1 | sudo tee /sys/class/leds/dell::kbd_backlight/brightness > /dev/null
    Does it change the brightness?

  4. #4
    Join Date
    Jun 2024
    Beans
    8

    Re: keyboard back light wont turn on 24.04

    Quote Originally Posted by wamiko View Post
    running Ubuntu 24.04 no partition
    laptop is dell latitude 5490
    Intel Core i5-8350U Quad Core CPU @ 1.9 Ghz
    16 GB RAM (DDR4 @ 2400Mhz)
    ok! so i went through several iterations of Ubuntu very briefly before settlin on 24.04 and they all had their own quirks. But the keyboard back light turned on in the version up to 23.10 but when i upgraded to 24.04 it stopped working and because 24.04 is relatively new there arent a lot articles about this issue on this specific iteration of Ubuntu.

    to be clear, the back light works. it turns on when i power down the laptop. I'm aware that this has happened to other people on previous versions of Ubuntu but im still new to Ubuntu and i dont know if the code fixes for those versions of Ubuntu will work for this version of Ubuntu
    I've had similar issues with keyboard backlight on previous Ubuntu versions. Have you tried running sudo apt-get install dell-backlight and then sudo dell-backlight -s 50 (or any other value you prefer) to see if it works?

  5. #5
    Join Date
    May 2024
    Beans
    2

    Re: keyboard back light wont turn on 24.04

    thank you! the code fix from ActionParsnip was an immediate fix. This is why I love Ubuntu. Thanks guys!

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