When your laptop is running on battery, the screen will dim when the computer is idle in order to save power.
GNOME Documentation Project
gnome-doc-list@gnome.org
Adam Matoušek
adamatousek@gmail.com 2012

# Why does my screen go dim after a while?

shaunm

We have a few disparate pages on this. We should consider consolidating or rethinking how we cross-link them.

When your laptop computer is running on battery, the screen will dim when the computer is idle in order to save power. When you start using the computer again, the screen will brighten.

You can stop the screen from dimming itself:

Klepněte na své jméno v horní liště a zvolte Nastavení systému.

Open Brightness & Lock and uncheck Dim screen to save power.