TITLE:          How to login into a WM using KDM
LFS VERSION:    4 and up.
KDE VERSION:	3.1
AUTHORS:	Remy Bosch <remy.bosch@hccnet.nl>


SYNOPSIS:
        How to successfully login into a WM using KDM

HINT:

 If we want to tell kdm what to start, we choose our favorite WM and klik
 on [Go!]. The problem is that you might get a standard WM from XFree86.
 After that, we discus XDMCP, so we can use remote-x

 I've put line numbers in the index so you can jump directly to the subject you
 want to read ;-)


CHANGELOG      --- Timestamps are in dd-mm-yy ---

 26-07-02 (dd-mm-yy)
  Typo in Xsession. "$1" must be "$1". Sorry :-}
 09-01-03
  Removed unneeded sections. kdm of kde3.1 (rc5) works well.
  Also the Xsession is fully under control of kdm :-)
  Still need to check the remote acces part :-(


INDEX
	XSESSION		line 37
	REMOTE ACCES		line 61
	XACCESS			line 89
	KDMRC			line 96
	IF ALL IS WELL		line 110
	REMOTE CLIENT		line 124
	REQUESTS		line 134


XSESSION

 We can have the following in /etc/X11/xdm/Xsession. It's all we need ;-)

-----begin-snip-----
# Begin /etc/X11/xdm/Xsession
#!/bin/bash --login

# redirect errors to a file in user's home directory if we can...
for errfile in "$HOME/.xsession-errors" "${TMPDIR-/tmp}/xses-$USER"
"/tmp/xses-$USER"
do
        if ( cp /dev/null "$errfile" 2> /dev/null )
        then
                chmod 600 "$errfile"
                exec > "$errfile" 2>&1
                break
        fi
done

# End /etc/X11/xdm/Xsession
-----end-snip-----


REMOTE ACCES

This way you can run KDE on a 486!
Looks amazing, but the programs are run on a server. One can call this a
application-server. I only talk about the X-part. There are tree ways to get
this show on the road. This is from XDM-Xterm mini-nowto:

  * Direct query : the X server contacts a named host, requesting that the
    server presents a login prompt on its display

  * Broadcast : the X server sends out a broadcast message to the network,
    and the first server running XDM that responds to the broadcast will be
    the one to present the login prompt on its display

  * Indirect query : the X server contacts a named host, but asks it which
    other hosts it knows about on the network. The named host will then
    present the user with a list of hosts to choose from, and will then go on
    to initiate communications with the selected host resulting in the
    selected host presenting a login prompt on the X servers display.


We do the fist (Direct query). It's IMO the best and easiest option.

To get it working, we do the following:
 - Edit Xacces
 - Edit kmdrc


XACCESS

 If you want to log in from an other computer (Remote X), you can add a IP
 number or hostname that is allowed to use remote X in
 /opt/kde/share/config/kdm/Xaccess.


KDMRC

 We still need to enable xdmcp... You can find it in the last section.
 I displayed a part of mine here.

-----begin-snip-----
[Xdmcp]
Enable=true
KeyFile=/opt/kde/share/config/kdm/xdm-keys
Willing=su nobody -c /opt/kde/share/config/kdm/Xwilling
Xaccess=/opt/kde/share/config/kdm/Xaccess
-----end-snip-----


IF ALL IS WELL

 When everything works as it should, you can started automaticly. This
 can be done by a script from /etc/init.d or we add a line in
 /etc/inittab.
 IMHO I don't care much about what runlevel should(not) be used. Though
 people say it should be runlevel "5".
 So the line to be added would be like:

 -----------
  x:5:respawn:/where/kdm/is/kdm -nodaemon
 -----------


REMOTE CLIENT

 To get the wanted loginscreen just run :

   X -query IP_number_of_server &> /dev/null &

 This way X is started and files one request for a loginscreen.
 And presto! There is your server-power on a small PC ;-)


REQUEST

 Remote login with root is not possible.
 Just send in solutions and sugestions to me, if you had a problem and solved
 it... Questions are welcome too.
 This way we all can enjoy a easy login ;-)

HAVE FUN !!!

 This should do the trick. Have fun!