Possible solutions for laptop/notebook brightness control issues

Users find laptop/notebook brightness control not working as expected

There is a commonly reported problem for many Linux distributions including OpenMandriva: users find laptop/notebook brightness control not working as expected.

Hardware manufacturers have created to many different ways to control laptop/notebook brightness controls so there is no one configuration that works for all.

Currently we know 3 workarounds that user could try.
These all involve changing something on the GRUB_CMDLINE_LINUX_DEFAULT line in the file /etc/default/grub.

First save a backup copy of the original file, so you can go back to that if you need to:

sudo cp /etc/default/grub /etc/default/grub.bak

Then:

  1. Change
    acpi_backlight=vendor
    to
    acpi_backlight=native

then save the file and run
sudo update-grub2
and reboot.
This one is perhaps the most common “fix” for users with this issue.

  1. Change
    acpi_backlight=vendor
    to
    acpi_backlight=video

then save the file and run
sudo update-grub2
and reboot.

  1. Remove this
    acpi_osi=Linux acpi_osi='!Windows 2012' acpi_backlight=vendor

then save the file and run
sudo update-grub2
and reboot.


  1. There is also an experimental package available for testing for Cooker users to try.

dnf in udev-backlight
Then reboot

udev-backlight package available for testing also in Rock and Rolling branches now.

For Rock x86_64:

sudo dnf in udev-backlight --enablerepo rock-testing-x86_64

For Rolling x86_64:

sudo dnf in udev-backlight --enablerepo rolling-testing-x86_64

znver 1 users simply change x86_64 in the command to znver1.

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Credits: @ben79