When your laptop is running on battery, the screen will dim when the computer is idle in order to save power.
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# 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:

Clique em seu nome na barra superior e selecione Configurações do sistema.

Open Screen and uncheck Dim screen to save power.