KDE: Difference between revisions

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@@ Line 7: / Line 7: @@
 {{file|3={
    # Enable Plasma
-   services.desktopManager.plasma6.enable = true;
+   services = {
+    desktopManager.plasma6.enable = true;
    # Default display manager for Plasma
-  services.displayManager.sddm = {
+    displayManager.plasma-login-manager.enable = true;
-    enable = true;
-  # To use Wayland (Experimental for SDDM)
-    wayland.enable = true;
-  };
    # Optionally enable xserver
-   services.xserver.enable = true;
+   # xserver.enable = true;
-}|name=configuration.nix|lang=nix}}{{Warning|SDDM is no longer supported on the unstable branch, users on unstable should use [[KDE#Plasma Login Manager|Plasma Login Manager]] instead. See configuration later in this page.}}
+  };
+}|name=configuration.nix|lang=nix}}
 == Configuration ==
@@ Line 35: / Line 31: @@
      elisa
    ];
-}|name=configuration.nix|lang=nix}}
-=== Plasma Login Manager ===
-[https://github.com/KDE/plasma-login-manager Plasma Login Manager] is currently only available in unstable. If you are on unstable you can enable it with the following configuration.
-{{File|3={
-  services.displayManager.plasma-login-manager = {
-    enable = true;
-  };
 }|name=configuration.nix|lang=nix}}
@@ Line 54: / Line 40: @@
    services.displayManager.defaultSession = "plasmax11";
 }|name=configuration.nix|lang=nix}}
+=== Unlock KDE Wallet with LUKS password ===
+When using LUKS disk encryption and autologin in your display manager, it is possible to unlock KDE Wallet with the LUKS password. Set the LUKS password, login password, and KWallet keyring password all to the same string, and for NixOS 25.11 and below use the following configuration:
+<syntaxhighlight lang="nix">
+{
+  boot.initrd.systemd.enable = true;
+  systemd.services.display-manager.serviceConfig.KeyringMode = "inherit";
+  security.pam.services.sddm-autologin.text = pkgs.lib.mkBefore ''
+    auth optional ${pkgs.systemd}/lib/security/pam_systemd_loadkey.so
+    auth include sddm
+  '';
+}
+</syntaxhighlight>
+For Plasma Login Manager in NixOS 26.05 or above, use:
+<syntaxhighlight lang="nix">
+{
+  boot.initrd.systemd.enable = true;
+  systemd.services.plasmalogin.serviceConfig.KeyringMode = "inherit";
+  security.pam.services.plasmalogin-autologin.rules.auth = {
+    systemd_loadkey = {
+      order = 0;
+      control = "optional";
+      modulePath = "${pkgs.systemd}/lib/security/pam_systemd_loadkey.so";
+    };
+    plasmalogin = {
+      order = 1;
+      control = "include";
+      modulePath = "plasmalogin";
+    };
+  };
+}
+</syntaxhighlight>
 == Troubleshooting ==
@@ Line 99: / Line 120: @@
 === Brightness and Color brightness control sets gamma instead of brightness on external monitors ===
-To allow <code>powerdevil</code> (and by extension the "Brightness and Color" status tray menu) to control brightness on supported monitors directly instead of adjusting gamma, [[Backlight#Via ddcutil|configure your system to enable ddcutil]], and allow your user to use DDC/CI without root.
+To allow <code>powerdevil</code> (and by extension the "Brightness and Color" status tray menu) to control brightness on supported monitors directly instead of adjusting gamma, [[Backlight#Via ddcutil|configure your system to enable ddcutil]], and allow your user to use DDC/CI without root. Note that you do not need to add <code>ddcutil</code> to your system packages because PowerDevil uses libddcutil.
+=== Plasma wallpaper reverts back to default after a Nix GC ===
+When setting a wallpaper, Plasma may save the path as a <code>/nix/store/*/share/wallpapers</code> path instead of <code>/run/current-system/sw/share/wallpapers/</code>. To fix this, open <code>$XDG_CONFIG_HOME/plasma-org.kde.plasma.desktop-appletsrc</code> and manually change the paths.
+=== No available locale settings in the Plasma system settings ===
+The "Region & Language" page in the Plasma system settings is somewhat broken on NixOS. Instead, edit the <code>$XDG_CONFIG_HOME/plasma-localerc</code> file.
+If you really want to configure locale in settings, you can use this workaround:
+<syntaxhighlight lang="nix">
+{ pkgs, ... }:
+{
+  i18n = {
+    extraLocales = "all";
+    imperativeLocale = true; # Unknown if needed (system settings sets user-level override?)
+  };
+  environment = {
+    systemPackages = [ pkgs.stdenv.cc.libc.out ]; # this derivation contains the locales
+    pathsToLink = [ "/share/i18n" ];
+  };
+}
+</syntaxhighlight>
+Switch to that configuration, then run:
+<syntaxhighlight lang="bash">
+sudo mkdir -p /usr/share/i18n
+sudo ln -s /run/current-system/sw/share/i18n/locales /usr/share/i18n/locales
+</syntaxhighlight>
+That is a very dirty command, and I don't know if it persists across reboots.
 == Tips and tricks ==