diff --git a/doc/guix.texi b/doc/guix.texi
index 2363874cf9..6b73225697 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -13181,8 +13181,8 @@ your user profile.  Failing to do that, if @code{auto-login-session} is
 false, you will be unable to log in.
 @end quotation
 
-@item @code{startx} (default: @code{(xorg-start-command)})
-The command used to start the X11 graphical server.
+@item @code{xorg-configuration} (default @code{(xorg-configuration)})
+Configuration of the Xorg graphical server.
 
 @item @code{xauth} (default: @code{xauth})
 The XAuth package to use.
@@ -13258,8 +13258,8 @@ Script to run before starting a wayland session.
 @item @code{sessions-directory} (default "/run/current-system/profile/share/wayland-sessions")
 Directory to look for desktop files starting wayland sessions.
 
-@item @code{xorg-server-path} (default @code{xorg-start-command})
-Path to xorg-server.
+@item @code{xorg-configuration} (default @code{(xorg-configuration)})
+Configuration of the Xorg graphical server.
 
 @item @code{xauth-path} (default @code{#~(string-append #$xauth "/bin/xauth")})
 Path to xauth.
@@ -13282,9 +13282,6 @@ Directory to look for desktop files starting X sessions.
 @item @code{minimum-vt} (default: 7)
 Minimum VT to use.
 
-@item @code{xserver-arguments} (default "-nolisten tcp")
-Arguments to pass to xorg-server.
-
 @item @code{auto-login-user} (default "")
 User to use for auto-login.
 
diff --git a/gnu/services/sddm.scm b/gnu/services/sddm.scm
index 2ebfe22016..a33eb39c43 100644
--- a/gnu/services/sddm.scm
+++ b/gnu/services/sddm.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2016 David Craven <david@craven.ch>
+;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -83,8 +84,8 @@
   (sessions-directory     sddm-configuration-sessions-directory
                           (default "/run/current-system/profile/share/wayland-sessions"))
   ;; [X11]
-  (xorg-server-path       sddm-configuration-xorg-server-path
-                          (default (xorg-start-command)))
+  (xorg-configuration     sddm-configuration-xorg
+                          (default (xorg-configuration)))
   (xauth-path             sddm-configuration-xauth-path
                           (default (file-append xauth "/bin/xauth")))
   (xephyr-path            sddm-configuration-xephyr-path
@@ -99,8 +100,6 @@
                           (default "/run/current-system/profile/share/xsessions"))
   (minimum-vt             sddm-configuration-minimum-vt
                           (default 7))
-  (xserver-arguments      sddm-configuration-xserver-arguments
-                          (default "-nolisten tcp"))
 
   ;; [Autologin]
   (auto-login-user        sddm-configuration-auto-login-user
@@ -140,7 +139,8 @@ SessionCommand="       (sddm-configuration-session-command config)             "
 SessionDir="           (sddm-configuration-sessions-directory config)          "
 
 [X11]
-ServerPath="           (sddm-configuration-xorg-server-path config)            "
+ServerPath="           (xorg-configuration-server
+                        (sddm-configuration-xorg config))            "
 XauthPath="            (sddm-configuration-xauth-path config)                  "
 XephyrPath="           (sddm-configuration-xephyr-path config)                 "
 DisplayCommand="       (sddm-configuration-xdisplay-start config)              "
@@ -148,7 +148,9 @@ DisplayStopCommand="   (sddm-configuration-xdisplay-stop config)               "
 SessionCommand="       (sddm-configuration-xsession-command config)            "
 SessionDir="           (sddm-configuration-xsessions-directory config)         "
 MinimumVT="            (number->string (sddm-configuration-minimum-vt config)) "
-ServerArguments="      (sddm-configuration-xserver-arguments config)           "
+ServerArguments="      (string-join
+                        (xorg-configuration-server-arguments
+                         (sddm-configuration-xorg config)))           "
 
 [Autologin]
 User="                 (sddm-configuration-auto-login-user config)             "
diff --git a/gnu/services/xorg.scm b/gnu/services/xorg.scm
index 3c547c1303..a3a4d769d7 100644
--- a/gnu/services/xorg.scm
+++ b/gnu/services/xorg.scm
@@ -436,8 +436,8 @@ desktop session from the system or user profile will be used."
             (default shepherd))
   (auto-login-session slim-configuration-auto-login-session
                       (default #f))
-  (startx slim-configuration-startx
-          (default (xorg-start-command)))
+  (xorg-configuration slim-configuration-xorg
+                      (default (xorg-configuration)))
   (sessreg slim-configuration-sessreg
            (default sessreg)))
 
@@ -454,7 +454,7 @@ desktop session from the system or user profile will be used."
                             (slim-configuration-auto-login-session config)))
           (slim    (slim-configuration-slim config))
           (xauth   (slim-configuration-xauth config))
-          (startx  (slim-configuration-startx config))
+          (startx  (xorg-start-command (slim-configuration-xorg config)))
           (shepherd   (slim-configuration-shepherd config))
           (theme-name (slim-configuration-theme-name config))
           (sessreg (slim-configuration-sessreg config)))
@@ -561,8 +561,7 @@ theme."
             (auto-login? auto-login?) (default-user default-user)
             (theme theme) (theme-name theme-name)
             (xauth xauth) (shepherd shepherd)
-            (auto-login-session auto-login-session)
-            (startx startx))))
+            (auto-login-session auto-login-session))))
 
 
 ;;;
@@ -641,8 +640,8 @@ makes the good ol' XlockMore usable."
   (default-user gdm-configuration-default-user (default #f))
   (gnome-shell-assets gdm-configuration-gnome-shell-assets
                       (default (list adwaita-icon-theme font-cantarell)))
-  (x-server gdm-configuration-x-server
-            (default (xorg-wrapper)))
+  (xorg-configuration gdm-configuration-xorg
+                      (default (xorg-configuration)))
   (x-session gdm-configuration-x-session
              (default (xinitrc))))
 
@@ -714,7 +713,8 @@ makes the good ol' XlockMore usable."
                             #$(gdm-configuration-dbus-daemon config))
                            (string-append
                             "GDM_X_SERVER="
-                            #$(gdm-configuration-x-server config))
+                            #$(xorg-wrapper
+                               (gdm-configuration-xorg config)))
                            (string-append
                             "GDM_X_SESSION="
                             #$(gdm-configuration-x-session config))
@@ -779,7 +779,6 @@ password."
   (service gdm-service-type
            (gdm-configuration
             (gdm gdm)
-            (allow-empty-passwords? allow-empty-passwords?)
-            (x-server x-server))))
+            (allow-empty-passwords? allow-empty-passwords?))))
 
 ;;; xorg.scm ends here
