I recently started using Godot 4.3, and the main issue I've had is with movement, where the player would lag a bit. It would just briefly stop moving and then start up again, creating what I at first thought was stuttering, like the player is moving through an invisible pool of sludge that slows it down. Yesterday I used a debugging process where I would print Input and Velocity every frame, and turns out that whenever the player would lag behind the input would flip on and off from zero even when I was holding down the movement key.

I searched the internet far and wide for solutions, changing many different settings, toggling Vsync, and much much more, but nothing worked. I don't know what to do about this input lag, and I am looking for a PERMANENT solution so it will not interfere with my making games. If anyone knows how to fix this, help would be appreciated.

I turned Vsync off and enabled fullscreen like it was suggested, and it did not change, only made it laggier. I tried changing the max FPS also, which did not fix the input turning to 0 and 1 randomly.

Previously I had posted this on stack overflow, but it was marked off topic because it wasn't about code, so please help me!

    Could be many different causes, as @kuligs2 asked, it would help to see the relevant code.

    The code does not matter as far as I know.
    extends CharacterBody2D

    @export var acceleration : float = 100
    @export var max_speed : float = 300

    var input := Vector2.ZERO

    func _physics_process(delta):
    input.x = Input.get_action_strength("ui_right") - Input.get_action_strength("ui_left")
    input.y = Input.get_action_strength("ui_down") - Input.get_action_strength("ui_up")

    input = input.normalized()


velocity.x = move_toward(velocity.x, max_speed * input.x, acceleration * delta)
velocity.y = move_toward(velocity.y, max_speed * input.y, acceleration * delta)
print("Input:", input, " Velocity:", velocity)
move_and_slide()

      Ghoul_Geek maybe instead of a box collisionshape you should use something round like sphere or capsule? maybe the player stuttering because it collides with uneven surface? Other than that, i cant even imagine your problem.. maybe if you could videotape it it would be clear.. i dont remember having problems like you describe..

          5 days later

          kuligs2 Basically the input turns off randomly. That's it. When I print the input and velocity, I see the input randomly switches to 0 and back.

            • Zini

            • Post #7

            Can you verify that the same doesn't happen in other applications? With the exact key? I had a similar problem a while back. Turned out to be a defective keyboard.

            Also, do you have another computer available on which you can try this Godot project?

            Another thing to test: You are combining two input actions in each component of input. Do you see anything different when you look at the actions individually?

            Godot simply does not have this kind of input issue. If this isn't a hardware problem per se then the only thing I can think of is that you happened to run into an undiscovered bug that only happens on a specific, uncommon type of system. In this case it might be best to post a bug report on GitHub.

            Probably obvious/covered already, but just in case make sure you're not using a bluetooth keyboard/mouse when testing.