In reply to @k900:0upti.me
I'm just annoyed AMDGPU has what seems to be a forced modeset on boot

testing it with something like this:

{
  inputs = {
    nixpkgs.url = "github:Kranzes/nixpkgs/plymouth";
    nixos-generators = { url = "github:nix-community/nixos-generators"; inputs.nixpkgs.follows = "nixpkgs"; };
  };

  outputs = { self, nixpkgs, nixos-generators }:
    let
      pkgs = nixpkgs.legacyPackages.x86_64-linux;
    in
    {
      packages.x86_64-linux.default = nixos-generators.nixosGenerate {
        inherit pkgs;
        modules = [{
          boot.initrd.systemd.enable = true;
          boot.plymouth.enable = true;
          boot.plymouth.theme = "breeze";
          documentation.nixos.enable = false;
          users.users.root.hashedPassword = "$y$j9T$92VDaYfgg6XS1G8/s4Yff1$ORqQG/Iy/hUUuRdee35PBNqHu3FsplYv9ui.hqTL/bC"; # 123
          users.mutableUsers = false;
        }];
        format = "vm-bootloader";
      };
    };
}

In reply to @kranzes:matrix.org
this plymouth PR works if i manually run systemctl restart plymouth-start.service but doesn't work in the initrd. interesting.