Xorg: Difference between revisions

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-To disable mouse acceleration for a touchpad, it's as simple as
+[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]].
-<pre>
+= Enabling =
-  services.xserver.libinput.enable = true;
-  services.xserver.libinput.accelProfile = "flat";
-</pre>
-But to disable it for a mouse, it's a bit more wordy -
+On NixOS, users can enable and configure Xorg through the {{nixos:option|services.xserver}} module in their system configuration.
-<pre>
+See {{NixOS Manual|name=NixOS Manual: Chapter - X Window Syestem|anchor=#sec-x11}} for information on using X11 with NixOS.
-   services.xserver.libinput.enable = true;
-   services.xserver.config = ''
+= Tips and tricks =
-     Section "InputClass"
-      Identifier "mouse accel"
+== HiDPI ==
-      Driver "libinput"
-      MatchIsPointer "on"
+HiDPI (High Dots Per Inch) displays, also known by Apple's "Retina Display" marketing name, are screens with a high resolution in a relatively small format. They are mostly found in high-end laptops and monitors.
-       Option "AccelProfile" "flat"
-       Option "AccelSpeed" "0"
+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:
-    EndSection
-   '';
+<syntaxhighlight lang="nix">
-</pre>
+  # bigger tty fonts
+  console.font =
+    "${pkgs.terminus_font}/share/consolefonts/ter-u28n.psf.gz";
+   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";
+  };
+  # 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>:
+<syntaxhighlight>
+Xft.dpi: 180
+</syntaxhighlight>
+== Disabling touchpad and mouse accelerations ==
+To disable touchpad and mouse accelerations just add the following lines to your <code>configuration.nix</code>
+<syntaxhighlight lang="nix">
+  services.xserver = {
+    enable = true;
+    ...
+    libinput = {
+      enable = true;
+       # disabling mouse acceleration
+      mouse = {
+        accelProfile = "flat";
+      };
+      # 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]]
+* [[Intel Graphics]]
+* [[:Category:Desktop environment]]
+* [[:Category:Window managers]]
+[[Category:Video]]