Hyprland

Hyprland is a dynamic tiling Wayland compositor.

Setting Hyprland to use grayscale display

Blank Shader

precision mediump float;
varying vec2 v_texcoord;
uniform sampler2D tex;

void main() {
    vec4 pixColor = texture2D(tex, v_texcoord);
    gl_FragColor = pixColor;
}

Grayscale Shader

precision mediump float;
varying vec2 v_texcoord;
uniform sampler2D tex;

void main() {

    vec4 pixColor = texture2D(tex, v_texcoord);

    vec3 greyScale = vec3(0.4, 0.25, 0.3);
    gl_FragColor = vec4(vec3(dot(pixColor.rgb, greyScale)), pixColor.a);
}

Save those two as files and run hyprctl keyword decoration:screen_shader <shader path>.

Use the blank shader to reset. Do a hyprland reload to clear notifications stuck at the top of the screen.

Screenshare not working

Restart xdg-desktop-portal-hyprland:

systemctl restart --user xdg-desktop-portal-hyprland.service

Source

hyprland.org