How to turn off and turn on keyboard backlit on Acer Aspire Lite AMD Ryzen 5-5625U on Linux

fayas
fayas Member Posts: 3 New User

I removed windows OS and booted Ubuntu 24.04 (linux). There is an option for changing color of backlight in Windows. After booting linux, I can't control the keyboard backlight. I can't even turn off and turn on the backlight of the keyboard. It is a Multicolor Backlit Keyboard.

What can I do now?

Answers

  • Sharanji
    Sharanji ACE Posts: 4,928 Pathfinder

    @fayas

    You can try these steps
    Using the Terminal (Advanced):
    Open Terminal: Open a terminal window (Ctrl+Alt+T).
    Install brightnessctl (if not already installed): sudo apt update && sudo apt install brightnessctl.
    Check keyboard brightness settings: brightnessctl --device='tpacpi::kbd_backlight' info.
    Set brightness: sudo brightnessctl --device='tpacpi::kbd_backlight' set 1 (replace '1' with desired brightness level).
    Turn off backlight: echo 0 | sudo tee /sys/class/leds/apple::kbd_backlight/brightness.
    Turn on backlight: echo 512 | sudo tee /sys/class/leds/apple::kbd_backlight/brightness.

    Using the Quick Settings Menu (GNOME 45):
    Open Quick Settings: Click on the system menu icon (usually in the top right corner) to open the Quick Settings menu.
    Find Keyboard Backlight: Locate the keyboard backlight toggle and slider.
    Toggle Backlight: Click the keyboard toggle to turn the backlight on or off.
    Adjust Brightness: Click the arrow icon to the right of the toggle to unfurl an interactive slider and adjust the brightness.

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊

  • fayas
    fayas Member Posts: 3 New User

    I tried brightnessctl. tpacpi::kbd_backlight was not found on devices list listed by brightnessctl. Also checked the Settings, but no option found for backlit.

  • fayas
    fayas Member Posts: 3 New User

    Now it is working.

    command: sudo nano /etc/default/grub

    and I changed the line of grub file

    GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=Vendor"
    

    then: sudo update-grub

    then: reboot

    Now I can control the backlit via internal keyboard.

    Thanks for [this](https://community.acer.com/en/discussion/722307/how-do-i-enable-the-keyboard-backlight-on-aspire-lite-al-15-41).

  • Sharanji
    Sharanji ACE Posts: 4,928 Pathfinder

    @fayas

    Glad you fixed it!! please mark my comment as "Yes, Answered"

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊