After using Yast/SAX to configure the display, subsequent launch of X no longer bring up the KDE windows manager.

Problem:

After using Yast/SAX to configure the display, subsequent launch of X no longer bring up the KDE windows manager.

Solution

This is a bug in Yast/SAX which reset the windows manager from kde to twm. To restore the KDE windows manager, do the followings:

  1. Edit /etc/sysconfig/displaymanager and change the value of DISPLAYMANAGER from xdm to kdm.
  2. Edit /etc/sysconfig/windowsmanager and change the value of DEFAULT_WM from twm to kde.
  3. Restart the X Server by pressing Ctrl-Alt-Backplace