Simple Solution - Dim display and later turn off display on idle

Needed app:

• Swayidle
• Brightnessctl - ONLY for IPS displays

How to achieve this?

Add the below entry to the hyprland config file:

# Start swayidle lockscreen script - 30 seconds for dim and 120 seconds for display off
exec-once = swayidle -w timeout 30 'brightnessctl set 0%' resume 'brightnessctl set 30%'
exec-once = swayidle -w timeout 120 'hyprctl dispatch dpms off' resume 'hyprctl dispatch dpms on'

What does this configuration do?

• Dims the screen:
  • After 30 seconds of idle time, it sets the display opacity to 0%.
  • When you move the mouse or press a key, it sets the opacity to 30%
• Turns the display off:
  • After 120 seconds of idle time, this will turn the display off.
  • When you move the mouse or press a key, it turns the display on.

How to disable this temporarily while watching videos on Firefox?

You can do this by adding a window rule to your hyprland config. The property that interests you is idleinhibit.

So if you want to disable the swayidle while watching a youtube movie or using firefox in fullscreen mode, you should add this windowrulev2 according to the Hyprland-wiki:

# Ignore dmming and display off for full-screen Firefox
windowrulev2 = idleinhibit fullscreen,class:firefox

This will disable swayidle for fullscreen firefox. So when you go full-screen with SUPER+F, till you get out of full screen mode, your computer will not go into idle.