KDE: Difference between revisions

Revision as of 22:32, 18 September 2022

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

Installing KDE Plasma

To use KDE Plasma, add this to your configuration.nix:

services.xserver.enable = true;
services.xserver.displayManager.ssdm.enable = true;
services.xserver.desktopManager.plasma5.enable = true;

Excluding some KDE Plasma applications from the default install

Not all applications that come pre-installed with the KDE Plasma desktop environment are desirable for everyone to have on their machines. There's a way to edit configuration.nix to exclude these kinds of packages, for example as follows:

services.xserver.desktopManager.plasma5.excludePackages = with pkgs.libsForQt5; [
  elisa
  gwenview
  okular
  oxygen
  khelpcenter
  konsole
  plasma-browser-integration
  print-manager
];

Troubleshoots

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

Add to your configuration.nix the following line:

programs.dconf.enable = true;

(See this issue)

@@ Line 1: / Line 1: @@
-== Installation ==
+KDE Plasma is a desktop environment that aims to be simple by default, powerful when needed.
-{{file|/etc/nixos/configuration.nix|nix|<nowiki>
-services.xserver.desktopManager.plasma5.enable = true;
-</nowiki>}}
-== Tips and Tricks ==
+== Installing KDE Plasma ==
-=== Enable GTK themes in KDE ===
-==== Enable GTK themes in KDE in KDE System Settings ====
+To use KDE Plasma, add this to your configuration.nix:
-Nixpkgs now provides the GTK configuration module for KDE system settings, which you can install with:
+<syntaxHighlight lang=nix>
+services.xserver.enable = true;
-<syntaxhighlight lang="console">$ nix-env -i kde-gtk-config</syntaxhighlight>
+services.xserver.displayManager.ssdm.enable = true;
+services.xserver.desktopManager.plasma5.enable = true;
-You should also install any GTK themes you like. You can choose a GTK theme and set related options in <code>System Settings > Application Appearance > GTK</code>.
+</syntaxHighlight>
-==== Enable GTK themes in KDE manually ====
-As a normal nix user you can install the Oxygen GTK theme:
-<syntaxhighlight lang="console">$ nix-env -i oxygen-gtk</syntaxhighlight>
-KDE will run any scripts you place in ~/.kde/env on startup so this is a good place to set the GTK_PATH so that applications can find the theme engine. If the path is wrong/unset you will see errors like this:
-<code>Gtk-WARNING **: Unable to locate theme engine in module_path</code>
+== Excluding some KDE Plasma applications from the default install ==
+Not all applications that come pre-installed with the KDE Plasma desktop environment are desirable for everyone to have on their machines. There's a way to edit configuration.nix to exclude these kinds of packages, for example as follows:
-To set Oxygen-GTK as the gtk theme create the following file and make it executable: ~/.kde/env/set-gtk-theme.sh
+<syntaxHighlight lang=nix>
-<syntaxhighlight lang="bash">
+services.xserver.desktopManager.plasma5.excludePackages = with pkgs.libsForQt5; [
-#!/bin/sh
+  elisa
+  gwenview
+  okular
+  oxygen
+  khelpcenter
+  konsole
+  plasma-browser-integration
+  print-manager
+];
+</syntaxHighlight>
-export GTK_PATH=$GTK_PATH:~/.nix-profile/lib/gtk-2.0
+== Troubleshoots ==
-export GTK2_RC_FILES=$GTK2_RC_FILES:~/.nix-profile/share/themes/oxygen-gtk/gtk-2.0/gtkrc
+=== Qt/KDE applications segfault on start ===
-</syntaxhighlight>
+This is caused by a stale QML cache [https://github.com/NixOS/nixpkgs/issues/177720 (see this issue)]. A dirty way to fix this is by running on a terminal the following command:
-Alternatively, on NixOS:
+<syntaxHighlight lang=sh>
+find ${XDG_CACHE_HOME:-$HOME/.cache}/**/qmlcache -type f -delete
+</syntaxHighlight>
-{{file|configuration.nix|nix|<nowiki>
+=== GTK themes are not applied in Wayland applications ===
-environment = {
+Add to your configuration.nix the following line:
-  systemPackages = [ pkgs.oxygen_gtk ];
-  shellInit = ''
-    export GTK_PATH=$GTK_PATH:${pkgs.oxygen_gtk}/lib/gtk-2.0
-    export GTK2_RC_FILES=$GTK2_RC_FILES:${pkgs.oxygen_gtk}/share/themes/oxygen-gtk/gtk-2.0/gtkrc
-  '';
-};
-</nowiki>}}
-Or alternatively, copy the themes folder in the home directory
+<syntaxHighlight lang=nix>
+programs.dconf.enable = true;
+</syntaxHighlight>
-<syntaxhighlight lang="console">
+[https://github.com/NixOS/nixpkgs/issues/180720 (See this issue)]
-$ cp -R ~/.nix-profile/share/themes/ ~/.themes
-</syntaxhighlight>
 [[Category:Desktop environments]]
 [[Category:Applications]]