I was trying to adjust my laptop's screen brightness using the command 'brightnessctl set 50%', but now the brightness is at 0 and I can barely see anything. I got this advice from an AI, but it hasn't worked and I'm hesitant to turn my laptop off. What can I do to get my screen brightness back to normal?
4 Answers
Some Linux distros still let you use function keys to adjust brightness. Give them all a shot! And just so you know, some AI suggestions can lead to unexpected results, so tread carefully with those.
You might want to try using a flashlight to see your screen better. If you have SSH running, that could help you access the system remotely. It seems like you just set the brightness too low, so rebooting shouldn’t cause any issues. And in the future, be cautious with AI advice—it can sometimes give you misleading instructions!
What laptop model and distro are you using? Generally, you can set the brightness by editing a text file in /sys. If a reboot doesn’t help, switching to tty might allow you to log in blindly and adjust the brightness value manually.
If you can't remember how to set the brightness back to 100% directly, you could boot from an installation ISO and use chroot to make adjustments to the brightness files. It's a bit involved, though.
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