2014-08-24 18:18:18 +01:00
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<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-x11">
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<title>X Window System</title>
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<para>The X Window System (X11) provides the basis of NixOS’ graphical
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user interface. It can be enabled as follows:
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<programlisting>
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services.xserver.enable = true;
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</programlisting>
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The X server will automatically detect and use the appropriate video
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driver from a set of X.org drivers (such as <literal>vesa</literal>
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and <literal>intel</literal>). You can also specify a driver
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manually, e.g.
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<programlisting>
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services.xserver.videoDrivers = [ "r128" ];
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</programlisting>
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to enable X.org’s <literal>xf86-video-r128</literal> driver.</para>
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<para>You also need to enable at least one desktop or window manager.
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Otherwise, you can only log into a plain undecorated
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<command>xterm</command> window. Thus you should pick one or more of
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the following lines:
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<programlisting>
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services.xserver.desktopManager.kde4.enable = true;
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services.xserver.desktopManager.xfce.enable = true;
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services.xserver.windowManager.xmonad.enable = true;
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services.xserver.windowManager.twm.enable = true;
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services.xserver.windowManager.icewm.enable = true;
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</programlisting>
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</para>
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<para>NixOS’s default <emphasis>display manager</emphasis> (the
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program that provides a graphical login prompt and manages the X
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server) is SLiM. You can select KDE’s <command>kdm</command> instead:
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<programlisting>
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services.xserver.displayManager.kdm.enable = true;
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</programlisting>
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</para>
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<para>The X server is started automatically at boot time. If you
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don’t want this to happen, you can set:
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<programlisting>
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services.xserver.autorun = false;
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</programlisting>
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The X server can then be started manually:
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<screen>
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$ systemctl start display-manager.service
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</screen>
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</para>
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<simplesect><title>NVIDIA Graphics Cards</title>
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<para>NVIDIA provides a proprietary driver for its graphics cards that
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has better 3D performance than the X.org drivers. It is not enabled
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by default because it’s not free software. You can enable it as follows:
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<programlisting>
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services.xserver.videoDrivers = [ "nvidia" ];
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</programlisting>
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You may need to reboot after enabling this driver to prevent a clash
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with other kernel modules.</para>
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<para>On 64-bit systems, if you want full acceleration for 32-bit
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programs such as Wine, you should also set the following:
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<programlisting>
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2014-09-07 03:14:44 +01:00
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hardware.opengl.driSupport32Bit = true;
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2014-08-24 18:18:18 +01:00
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</programlisting>
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</para>
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</simplesect>
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<simplesect><title>Touchpads</title>
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<para>Support for Synaptics touchpads (found in many laptops such as
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the Dell Latitude series) can be enabled as follows:
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<programlisting>
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services.xserver.synaptics.enable = true;
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</programlisting>
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The driver has many options (see <xref linkend="ch-options"/>). For
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instance, the following enables two-finger scrolling:
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<programlisting>
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services.xserver.synaptics.twoFingerScroll = true;
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</programlisting>
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</para>
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</simplesect>
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</chapter>
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