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/ 3 Years ago, mon, august 16, 2021, 8:38:20
Please provide me a solution how to fix this?
More From » 12.04
Please provide me a solution how to fix this?
Edit "/etc/default/grub" as root.
gksu gedit /etc/default/grub
Now, look for the line that looks like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Append "acpi_backlight=vendor acpi_osi=Linux" to the end of that line, before the end quotes, so that the line now looks something like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi=Linux"
Save and close the file, and run the following command:
sudo update-grub
Now, reboot, and test out the brightness keys. They should be working correctly now.