Game hitches when clicking with mouse

[RylanYancey]

Bevy version

0.16.0

Relevant system information

• Linux (Ubuntu 24.10)
• Kernel: 6.11.0-26-generic
• Display Server: X11
• CPU: AMD Ryzen 5 7640U
• RAM: 32GB DDR5

Adapters tested:

• Radeon 760M APU
• NVIDIA RTX 4060 (External enclosure)

What you did

When I click on the screen with any mouse button, the app hitches for about 1/4 of a second.

Compilation settings

[profile.dev]
opt-level = 1

[profile.dev.package."*"]
opt-level = 3

Additional information

• This occurs regardless of which mouse button was clicked, including middle, left, and right.
• Occurs on any mouse, even my laptops' trackpad.
• Occurs on "dev" and "release" modes.
• Occurs in ALL bevy projects on this system.

I'm seeing alot of this as well, but it seems to be related to issues with Nvidia on X11. Not sure if related.

2025-05-23T17:11:01.140895Z  WARN bevy_render::view::window: Couldn't get swap chain texture after configuring. Cause: 'The underlying surface has changed, and therefore the swap chain must be updated'
2025-05-23T17:11:01.244833Z  WARN bevy_render::view::window: Couldn't get swap chain texture after configuring. Cause: 'The underlying surface has changed, and therefore the swap chain must be updated'

Let me know what other information I can provide, or if you think its a non-bevy issue.

[RylanYancey]

The issue is solved by waiting until the window is created, then setting "focused" and "visible" to true, waiting until that is processed, then setting any other variables. This also seems to solve similar issues with setting the window grab mode on X11.

Here's my fix:

use bevy::{diagnostic::FrameCount, prelude::*, window::CursorGrabMode};

#[derive(States, Eq, PartialEq, Clone, Debug, Hash, Default)]
pub enum WindowState {
    #[default]
    Starting,
    Ready,
}

pub fn update_window_state(
    mut state: ResMut<NextState<WindowState>>,
    mut window: Single<&mut Window>,
    frames: Res<FrameCount>,
) {
    if frames.0 > 32 {
        state.set(WindowState::Ready);

       // set the window to visible after a bit of time
        window.focused = true;
        window.visible = true;
    }
}

// runs when WindowState enters Ready
pub fn set_window_properties(
    mut window: Single<&mut Window>,
) {
    // do whatever you want with the window
    window.cursor_options.grab_mode = CursorGrabMode::Confined;
    
    #[cfg(not(debug_assertions))] {
        use bevy::window::WindowMode;
        
        window.mode = WindowMode::BorderlessFullscreen(
            MonitorSelection::Primary,
        );
    }
}

// in main.rs
DefaultPlugins
            .set(
                WindowPlugin {
                    primary_window: Some(
                        Window {
                            title: "Spectral Puzzle Game".into(),
                            mode: WindowMode::Windowed, // < set WindowMode to windowed by default
                            visible: false, // < set visible to false by default
                            cursor_options: CursorOptions {
                                visible: false,
                                ..default()
                            },
                            ..default()
                        }
                    ),
                    ..default()
                }
            ),