01/02: doc: Document xorg keymap configuration.

[julien lepiller]

roptat pushed a commit to branch master
in repository guix.

commit 136a1e8b577a5f44e7ff35e24d81d13be922f2af
Author: Julien Lepiller <address@hidden>
Date:   Wed Jun 6 19:01:42 2018 +0200

    doc: Document xorg keymap configuration.
    
    * doc/guix.texi (Xorg display): Add an example xorg keymap configuration.
---
 doc/guix.texi | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/doc/guix.texi b/doc/guix.texi
index 965ac42..6ed4799 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -11857,6 +11857,44 @@ resolutions---e.g., @code{((1024 768) (640 480))}.
 Last, @var{extra-config} is a list of strings or objects appended to the
 configuration file.  It is used to pass extra text to be
 added verbatim to the configuration file.
+
address@hidden keymap
address@hidden keyboard layout
+This procedure is especially useful to configure a different keyboard layout
+than the default US keymap.  For instance, to use the ``bépo'' keymap by
+default on the display manager:
+
address@hidden
+(define bepo-evdev
+  "Section \"InputClass\"
+        Identifier \"evdev keyboard catchall\"
+        Driver \"evdev\"
+        MatchIsKeyboard \"on\"
+        Option \"xkb_layout\" \"fr\"
+        Option \"xkb_variant\" \"bepo\"
+EndSection")
+
+(operating-system
+  ...
+  (services
+    (modify-services %desktop-services
+      (slim-service-type config =>
+        (slim-configuration
+          (inherit config)
+          (startx (xorg-start-command
+                   #:configuration-file
+                   (xorg-configuration-file
+                     #:extra-config
+                     (list bepo-evdev)))))))))
address@hidden example
+
+The @code{MatchIsKeyboard} line specifies that we only apply the configuration
+to keyboards.  Without this line, other devices such as touchpad may not work
+correctly because they will be attached to the wrong driver.  In this example,
+the user typically used @code{setxkbmap fr bepo} to set their favorite keymap
+once logged in.  The first argument corresponds to the layout, while the second
+argument corresponds to the variant.  The @code{xkb_variant} line can be 
omitted
+to select the default variant.
 @end deffn
 
 @deffn {Scheme Procedure} screen-locker-service @var{package} address@hidden