Why is window_set_min_size ignored?

Called too early (before window exists) or wrong window id. Call from _ready() and pass DisplayServer.MAIN_WINDOW_ID explicitly to make platform behavior consistent.

Project setting alternative?

Project Settings → Display → Window → Size → Window Width Override / Window Height Override (and Window Min Size where supported) sets it before any script runs.

Wayland vs X11 vs macOS?

Some compositors don't enforce min size programmatically until after first present. Set the value in project settings to take effect immediately at startup.

Fix: Godot DisplayServer window_set_min_size Ignored

Quick answer: Call DisplayServer.window_set_min_size(Vector2i(800, 600), DisplayServer.MAIN_WINDOW_ID) from _ready. Set fallback in Project Settings → Display → Window.

User resizes the window smaller than your UI tolerates. min_size set in _init didn’t stick because the window wasn’t fully realized yet.

The Fix

extends Node

func _ready():
    DisplayServer.window_set_min_size(
        Vector2i(800, 600),
        DisplayServer.MAIN_WINDOW_ID
    )

Belt-and-braces: also set in Project Settings so the early window honors the limit.

Verifying

Drag window resize. Cannot shrink below 800×600. Without the fix: shrinks freely.

“_ready timing. window_id explicit. Min holds.”

Related Issues

For canvas layer input, see canvas input. For onready order, see onready order.

_ready. Window id. Min sticks.