There are a few steps you can try to resolve this issue: McKesson Connect
- Check if your system is detecting the correct hardware for controlling screen brightness:
Open a terminal and run the following command:
This will list the directories in the "/sys/class/backlight/" directory. One of the directories listed should correspond to your screen's backlight control.
- Check if the correct permissions are set for the backlight control:
Run the following command to check the permissions on the backlight control:
ls -l /sys/class/backlight/
sudo chmod 666 /sys/class/backlight/
Reply Like 1 View the author
I've installed linux,but I can't lower the screen brightness.I've tried shortcut but still not work
i install linux in my laptop.