KDE: Difference between revisions

From NixOS Wiki
Sandro (talk | contribs)
xserver for plasma 6 is optional
Sandro (talk | contribs)
Plasma 6 first
Line 38: Line 38:
Some optional packages can be excluded if they are not needed at the cost of functionality.
Some optional packages can be excluded if they are not needed at the cost of functionality.


==== Plasma 5 ====
==== Plasma 6 ====


Optional packages: [https://github.com/NixOS/nixpkgs/blob/nixos-24.05/nixos/modules/services/x11/desktop-managers/plasma5.nix#L278-L282 plasma5.nix]
Optional packages: [https://github.com/NixOS/nixpkgs/blob/nixos-unstable/nixos/modules/services/desktop-managers/plasma6.nix#L136-L149 plasma6.nix]


<syntaxHighlight lang=nix>
<syntaxHighlight lang=nix>
environment.plasma5.excludePackages = with pkgs.libsForQt5; [
environment.plasma6.excludePackages = with pkgs.kdePackages; [
   plasma-browser-integration
   plasma-browser-integration
   konsole
   konsole
   oxygen
   elisa
];
];
</syntaxHighlight>
</syntaxHighlight>


==== Plasma 6 ====
==== Plasma 5 ====


Optional packages: [https://github.com/NixOS/nixpkgs/blob/nixos-unstable/nixos/modules/services/desktop-managers/plasma6.nix#L136-L149 plasma6.nix]
Optional packages: [https://github.com/NixOS/nixpkgs/blob/nixos-24.05/nixos/modules/services/x11/desktop-managers/plasma5.nix#L278-L282 plasma5.nix]


<syntaxHighlight lang=nix>
<syntaxHighlight lang=nix>
environment.plasma6.excludePackages = with pkgs.kdePackages; [
environment.plasma5.excludePackages = with pkgs.libsForQt5; [
   plasma-browser-integration
   plasma-browser-integration
   konsole
   konsole
   elisa
   oxygen
];
];
</syntaxHighlight>
</syntaxHighlight>

Revision as of 18:54, 17 August 2024

KDE Plasma is a desktop environment that aims to be simple by default, powerful when needed.

Installation

Plasma 6

/etc/nixos/configuration.nix
{
  services.xserver.enable = true; // optional
  services.displayManager.sddm.enable = true;
  services.displayManager.sddm.wayland.enable = true;
  services.desktopManager.plasma6.enable = true;
}

Plasma 5

/etc/nixos/configuration.nix
{
  services.xserver.enable = true;
  services.displayManager.sddm.enable = true;
  services.xserver.desktopManager.plasma5.enable = true;
}

Configuration

Rootless X11

sddm launches X11 as a root user by default. For better security, X11 can be run as a non-root user but using Wayland is preferred and better tested:

services.xserver.displayManager.sddm.settings.General.DisplayServer = "x11-user";

Excluding applications from the default install

Some optional packages can be excluded if they are not needed at the cost of functionality.

Plasma 6

Optional packages: plasma6.nix

environment.plasma6.excludePackages = with pkgs.kdePackages; [
  plasma-browser-integration
  konsole
  elisa
];

Plasma 5

Optional packages: plasma5.nix

environment.plasma5.excludePackages = with pkgs.libsForQt5; [
  plasma-browser-integration
  konsole
  oxygen
];

GNOME desktop integration

Using the following example configuration, QT applications will have a look similar to the GNOME desktop, using a dark theme.

qt = {
  enable = true;
  platformTheme = "gnome";
  style.name = "adwaita-dark";
};

For other themes, you may need the packages libsForQt5.qt5ct and libsForQt5.qtstyleplugin-kvantum and a symlink from ~/.config/Kvantum/ to your theme package. Here is an example using Arc-Dark and Home Manager. In the Home Manager configuration:

qt = {
  enable = true;
  platformTheme = "qtct";
  style.name = "kvantum";
};

xdg.configFile = {
  "Kvantum/ArcDark".source = "${pkgs.arc-kde-theme}/share/Kvantum/ArcDark";
  "Kvantum/kvantum.kvconfig".text = "[General]\ntheme=ArcDark";
};

For more details, see this forum post.

Default Wayland/X11 session

Plasma 5

Plasma 5 runs on X11 by default and it is recommend to use Plasma 6 for Wayland instead. To launch a Wayland session by default anyway:

services.xserver.displayManager.defaultSession = "plasmawayland";

Plasma 6

Plasma 6 runs on Wayland by default. To launch an X11 session by default:

services.xserver.displayManager.defaultSession = "plasmax11";

SDDM on Wayland

services.xserver.displayManager.sddm.wayland.enable = true;

Troubleshooting

Qt/KDE applications segfault on start

This is caused by a stale QML cache (see this issue). A dirty way to fix this is by running on a terminal the following command:

find ${XDG_CACHE_HOME:-$HOME/.cache}/**/qmlcache -type f -delete

GTK themes are not applied in Wayland applications / Window Decorations missing / Cursor looks different

This affects GTK applications including Firefox and Thunderbird.

If you are using Plasma 5, add to your configuration.nix the following line:

programs.dconf.enable = true;

You might also need to set a GTK theme Breeze imitating the KDE theme with the same name in System Settings -> Application Style -->Configure GNOME/GTK Application Style.

(See this issue)

Tips and tricks

Plasma-Manager

Note: Plasma-Manager is not matured yet and unofficial community project

By default, the Plasma configuration can be handled like on traditional systems. With plasma-manager, it is possible to make Plasma configurations via nix by providing home-manager modules.