Start and Problems in using KDE
In some cases, the CDE desktop is already running §-(( .
The (very elegant

) ) way to stop CDE without reboot mentioned by IBM is: kill command to the X server (cat /var/dt/Xpid ; kill -term process-id; you can go back to CDE with "/usr/dt/bin/dtlogin -daemon"

.
Then you have to create your own $HOME/.xinitrc file (copy from /usr/lib/X11/defaults/xinit/xinitrc ) and remove all lines containg start directives of applications and the window manager (near the end of the file).
Include instead the "/opt/kde/bin/startkde" command.
Include /opt/kde/bin in your PATH and re-source your login script.
Run "xinit" and wait.
Also on the fastest IBM machines the KDE start will be slower then under Linux (static linked binaries !).
Sometimes KDE hangs after clicking the logout button. Mostly it occurs if not all applications are closed.
In this case you have to kill your session manually (with the STRG+ALT+BACK combination or from network via telnet)