When your laptop is running on battery, the screen will dim when the computer is idle in order to save power.
GNOME ドキュメンテーションプロジェクト
gnome-doc-list@gnome.org
松澤 二郎
jmatsuzawa@gnome.org 2011, 2012
赤星 柔充
yasumichi@vinelinux.org 2011, 2012
Kentaro KAZUHAMA
kazken3@gmail.com 2012
日本GNOMEユーザー会
http://www.gnome.gr.jp/ 2011, 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:

トップバーにあるユーザー名をクリックし、システム設定を選択します。

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