I installed X11 according INSTALL and didn't change anything in the
configuration, except for what is said in INSTALL.

'/usr/X11R6/lib/X11/xkb/compiled/de.xkm' exists.

/usr/X11R6/lib/X11/xdm/Xservers:
----- cut here -----
:0 local /usr/X11R6/bin/X -dev /dev/grf5 -mode 3 +kb -xkbmap de
----- cut here -----

/usr/X11R6/lib/X11/xinit/xserverrc:
----- cut here -----
X -dev /dev/grf5 -mode 3 +kb -xkbmap de
----- cut here -----

Why does xterm not show/accept Umlaute?

--
Cu  Georges Heinesch, Luxembourg
    geohei@ibm.net - geohei@geocities.com
    http://www.geocities.com/yosemite/2480
    PGP 2.6.3i / 5.1i public key on request and on public servers

... better do a good thing today, than a perfect thing tomorrow ...