bug: hyprland does not start on nvidia systems

[FegrusB]

I am trying to install using the install script. It seems to work well, but upon finishing hyprland opens fine, but then is totally unresponsive. No key combinations are doing anything. Trying to look into this myself, but I'm very new to nix, and it's difficult with nothing opening! Also, the timezone is incorrect, and doesn't match the one I set in the config nano, could that be related? Thanks for the setup, looks great, if I can get it working!

[FegrusB]

I've gone back to a fresh install, and now am having new problems. The script ran, with a fair few warnings about changed commands. Now I've got a login screen, but once I log in the system fails to load. I'm not running a VM, but I'm guessing the issue is my Nvidia card, though I do also have an intel IGPU. Giving fixing it ago, but there is still an issue.

[librephoenix]

It would definitely be the Nvidia card. I don't have any Nvidia hardware so I never bothered to include the relevant config.

The autoinstall script should generate a hardware-configuration.nix for your hardware (Nvidia), but in order for Hyprland to work with Nvidia I think you need to add extra to the Hyprland config (for my config this would be in user/wm/hyprland/hyprland.nix.

This wiki page is probably your friend in this instance: https://wiki.hyprland.org/Nvidia/ but I've never tried any of this so unfortunately I don't know.

[librephoenix]

I'll keep this issue open for now since it would probably be possible to add that configuration in conditionally if the config detects an Nvidia card. I'll probably do that once I get a system with an Nvidia card in it :)

[wowvain-dev]

I don't have your exact configuration but these are the relevant lines that make my nvidia card work on hyprland (my solution assumes you have a similar flake based config to how emmet has it set up. Otherwise, just copying all the contents inside the curly brackets to your configuration.nix should do):

graphics.nix:

 {... }:

{
  hardware = {
    nvidia = {
      nvidiaSettings = true;
      open = true;
      modesetting.enable = true;
    };
  };
}

wayland.nix

{ config, pkgs, ... }:

{
  imports = [
    ./pipewire.nix
    ./dbus.nix
    ./gnome-keyring.nix
    ./fonts.nix
  ];

  environment.systemPackages = with pkgs; [
    wayland 
    waydroid
    (sddm-chili-theme.override {
      themeConfig = {
        blur = true;
        ScreenWidth = 2560;
        ScreenHeight = 1440;
        recursiveBlurLoops = 3;
        recursiveBlurRadius = 5;
      };
    })
  ];

  services.xserver = {
    enable = true;
    videoDrivers = [ "nvidia" "modesetting" ];
    xkb = {
      layout = "us";
      variant = "";
      options = "eurosign:e,caps:escape";
    };
  };

  environment.sessionVariables = {
		WLR_DRM_DEVICES = "/dev/dri/card1";
                WLR_NO_HARDWARE_CURSORS = "1";
                NIXOS_OZONE_WL = "1";
  };
}

hyprland.nix

{ inputs, pkgs, pkgs-unstable, lib, userSettings, ... }:
let
  pkgs-hyprland = inputs.hyprland.inputs.nixpkgs.legacyPackages.${pkgs.stdenv.hostPlatform.system};
in 
{
  # Wayland configs
  imports = [
    ./wayland.nix
    ./pipewire.nix
    ./dbus.nix
  ];

  # Security
  security = {
    pam.services.login.enableGnomeKeyring = true;
  };

  services.gnome.gnome-keyring.enable = true;

  programs = {
    hyprland = {
      enable = true;
    
      xwayland = {
        enable = true;
      };
      portalPackage = pkgs-hyprland.xdg-desktop-portal-hyprland;
    };
  };

  services.xserver.excludePackages = [ pkgs.xterm ];

  services.xserver = {
    displayManager = {
      gdm = {
        enable = true;
        wayland = true;
      };
    };
  };
}

Be careful about the WLR_DRM_DEVICES env variable. First use

udevadm info -a -n /dev/dri/card0 | grep DRIVER

to figure out what your correct GPU path is, and then set it to which one you want. The current option works on my system but it can easily differ for you.