I suggest to use the default config to test if that works, and then change bit by bit to your desired configuration. I have a community just for this kind of questions by the way … Window Managers

I do not use hyprland anymore but this was my working config:

general {
    lock_cmd = pidof hyprlock || hyprlock -c ~/.config/hypr/hyprlock/hl-sw06.conf
    before_sleep_cmd = loginctl lock-session
    after_sleep_cmd = hyprctl dispatch dpms on
}

listener {
    timeout = 270 #270
    on-timeout = brightnessctl -s set 4000
    on-resume = brightnessctl -r
}


listener {
    timeout = 300 #300
    on-timeout = loginctl lock-session
}

listener {
    timeout = 330 #330
    on-timeout = hyprctl dispatch dpms off
    on-resume = hyprctl dispatch dpms on
}

listener {
    timeout = 600
    on-timeout = systemctl suspend
}

Green/orange LCD screens, needle speed dials, just perfection.

I bet they put the toilet paper roll the other way too…