https://www.reddit.com/r/i3wm/comments/58j1ui/how_to_intercept_the_power_button_to_avoid_brutal/ Note that you might want suspend instead of hibernate, if you want rapid resume. The power button isn’t handled by the window manager, it’s handled by systemd For example this is in my /etc/systemd/logind.conf [Login] HandlePowerKey=hibernate HandleLidSwitch=ignore IdleAction=suspend IdleActionSec=20min