kdm(1) KDE Display Manager


kdm [options] [tty]


kdm is the KDE display manager also known as login manager. It shows a graphical login screen for username and password. After authenticating the user it starts a session.
kdm can be configured for remote login via XDMCP. XDMCP is the "X Display Manager Control Protocol" which is used to set up connections between remote systems over the network.

kdm is a derivative of xdm. man 1 xdm may provide useful information (requires installed xdm). For X-related problems try man 7x X and man 1 startx.


Daemonize even when started by init
Don't daemonize even when started from command line
-config file
Use alternative master configuration file
-xrm res
Override frontend-specific resource
-error file
Use alternative log file
-debug num
Debug option bitfield:
0x1 - core log
0x2 - config reader log
0x4 - greeter log
0x8 - IPC log
0x10 - session sub-daemon post-fork delay
0x20 - config reader post-start delay
0x40 - greeter post-start delay
0x80 - don't use syslog
0x100 - core Xauth log
0x400 - valgrind config reader and greeter
0x800 - strace config reader and greeter


configuration file with background settings
options for X display manager kdm
the kdm configuration file
access control file for XDMCP connections
script to run as root after session exits
script to run as user after login of user
script to run as root before the login dialog appears

this script can be edited to disable or modify the running of xconsole on the kdm greeter screen

script to run as root before session starts
output of this script is displayed in the chooser window


Steffen Hansen <hansen@kde.org>

Thomas Tanghus <tanghus@earthling.net>
Oswald Buddenhagen <ossi@kde.org>
Please use http://bugs.kde.org to report bugs; do not mail the authors directly.

This manual page was written by Holger Hartmann <Holger_Hartmann@gmx.de> for the Debian Project, but may be used by others. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any later version published by the Free Software Foundation.

On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.