Xorg: Difference between revisions

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VisualWikitext

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+[https://en.wikipedia.org/wiki/X.Org_Server Xorg] is the implementation of the [https://en.wikipedia.org/wiki/X_Window_System X Window System]. It acts as the bridge between your system's hardware and the graphical user environment enabling a variety of [[:Category:Desktop environment|desktop environments]] and [[:Category:Window managers|window managers]].
+= Enabling =
+On NixOS, users can enable and configure Xorg through the {{nixos:option|services.xserver}} module in their system configuration.
+See {{NixOS Manual|name=NixOS Manual: Chapter - X Window Syestem|anchor=#sec-x11}} for information on using X11 with NixOS.
+= Tips and tricks =
 == HiDPI ==
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 Not all software behaves well in high-resolution mode yet. Here are listed most common tweaks which make work on a HiDPI screen more pleasant:
-<pre>
+<syntaxhighlight lang="nix">
    # bigger tty fonts
    console.font =
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    services.xserver.dpi = 180;
    environment.variables = {
+    ## Used by GTK 3
+    # `GDK_SCALE` is limited to integer values
      GDK_SCALE = "2";
+    # Inverse of GDK_SCALE
      GDK_DPI_SCALE = "0.5";
+    # Used by Qt 5
+    QT_AUTO_SCREEN_SCALE_FACTOR = "1";
      _JAVA_OPTIONS = "-Dsun.java2d.uiScale=2";
    };
-</pre>
+  # Expose variables to graphical systemd user services
+  services.xserver.displayManager.importedVariables = [
+    "GDK_SCALE"
+    "GDK_DPI_SCALE"
+    "QT_AUTO_SCREEN_SCALE_FACTOR"
+  ];
+</syntaxhighlight>
+To enable HiDPI scaling for Qt 6 applications, add the following to <code>.Xresources</code>:
-In NixOS unstable (but not in NixOS 20.03) there is also a dedicated [https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/hardware/video/hidpi.nix HiDPI module]:
+<syntaxhighlight>
+Xft.dpi: 180
+</syntaxhighlight>
-<pre>
+== Disabling touchpad and mouse accelerations ==
-{
-  hardware.video.hidpi.enable = true;
-}
-</pre>
-This option will be included by default when using <code>nixos-config-generate</code> and it detects a screen larger than
+To disable touchpad and mouse accelerations just add the following lines to your <code>configuration.nix</code>
-fullhd. This will only set linux console fonts xserver dpi settings and environment variables still needs to be applied manually.
-== Disabling mouse acceleration ==
+<syntaxhighlight lang="nix">
-To disable mouse acceleration for a touchpad, it's as simple as
+  services.xserver = {
+    enable = true;
-<pre>
+    ...
-  services.xserver.libinput.enable = true;
-  services.xserver.libinput.accelProfile = "flat";
-</pre>
-But to disable it for a mouse, it's a bit more wordy -
+    libinput = {
+      enable = true;
-<pre>
+       # disabling mouse acceleration
-  services.xserver.libinput.enable = true;
+       mouse = {
-  services.xserver.config = ''
+        accelProfile = "flat";
-    Section "InputClass"
+       };
-       Identifier "mouse accel"
-       Driver "libinput"
-      MatchIsPointer "on"
-      Option "AccelProfile" "flat"
-       Option "AccelSpeed" "0"
-    EndSection
-  '';
-</pre>
-== See also ==
+      # disabling touchpad acceleration
+      touchpad = {
+        accelProfile = "flat";
+      };
+    };
+    ...
+  };
+</syntaxhighlight>
+To get more information see <code>man configuration.nix</code>.
+== Exclude packages ==
+Some packages like xterm are included when enabling Xorg. To exclude packages, edit the <code>configuration.nix</code> as the example, but be sure to have another terminal enabled in your build before doing this.
+<syntaxhighlight lang="nix">
+services.xserver.excludePackages = with pkgs; [
+  xterm
+];
+</syntaxhighlight>
+= See also =
+* [[Wayland]]
 * [[Nvidia]]
-* [[Amd Gpu]]
+* [[AMD GPU]]
 * [[Intel Graphics]]
+* [[:Category:Desktop environment]]
+* [[:Category:Window managers]]
+[[Category:Video]]