I recently installed Zorin OS 16 but have been unable to adjust the display brightness. I can see and interact with the brightness slider, but it does not adjust the brightness of the screen. Can I get some help with this?
Can you please try the following:
sudo nano /etc/default/grub
If the above produces an empty file instead of opening the grub file, try:
sudo nano /etc/default/grub.ucf-dist
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to instead say,
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Press ctrl+x to exit, then the
y key to say Yes to Save, then the
enter key to save as current configuration. The terminal will revert to normal.
Next, update grub:
Reboot and test.
If you have a Lenovo Thinkpad, use this, instead:
If none of the above work, you might try another brightness controller than the default one:
sudo add-apt-repository ppa:apandada1/brightness-controller
sudo apt update && sudo apt install brightness-controller
haven't tried myself the solution proposed by Aravisian but do you know if this would work with an external monitor? Just curious.
It should work the same for all monitors.