gnome-power-manager - 43.0-1pureos1 main

GNOME Power Manager is a session daemon for the GNOME desktop
that takes care of system or desktop events related to power, and
triggers actions accordingly. Its philosophy is to completely hide
these complex tasks and only show some settings important to the user.
.
GNOME power manager displays and manages battery status, power plug
events, display brightness, CPU, graphics card and hard disk drive
power saving, and can trigger suspend-to-RAM, hibernate or shutdown
events, all integrated to other components of the GNOME desktop.