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       kdm.options - configuration options for X display manager


       /etc/kde4/kdm/kdm.options  contains  a set of flags that determine some
       of the behavior of the X display manager kdm(1).

       /etc/kde4/kdm/kdm.options may contain comments, which begin with a hash
       mark  and end at the next newline, just like comments in shell scripts.
       The rest of the file consists of options which are expressed  as  words
       separated  by  hyphens, with only one option per line.  If an option is
       present with the 'no-' prefix, or absent, it is disabled, otherwise  it
       is considered enabled.

       Available options are:

              Normally,   the  contents  of  the  /etc/nologin  file  will  be
              displayed using xmessage(1x) (if xmessage is available), and the
              user will be returned to the kdm login screen after the xmessage
              is dismissed.  If this option is enabled, kdm starts  a  session
              as  usual  (after  the  xmessage  is  dismissed,  if xmessage is

              Enable this option with caution  on  'production'  machines;  it
              causes  the  kdm  daemon to be stopped and restarted on upgrade,
              even if the process has children (which means it is  managing  X
              sessions).   Typically  when a package that contains a daemon is
              being installed or  upgraded,  its  maintainer  scripts  stop  a
              running  daemon  process  before  installing the new binary, and
              restart it after the new  binary  is  installed.   Stopping  kdm
              causes immediate termination of any sessions it manages; in some
              situations this could be an unwelcome  surprise  (for  instance,
              for  remote  kdm  users  who  had  no idea the administrator was
              performing system maintenance).  On the other hand, for machines
              that  stay  up  for long periods of time, leaving the old daemon
              running can be a bad idea if the new version has, for  instance,
              a fix for a security vulnerability (overwriting kdm's executable
              on the file system has no effect on the copy of kdm in  memory).
              The  kdm pre-removal script checks to see if the kdm process has
              any children; if it does, it is possible that someone's  session
              would  be  killed by stopping kdm, so a warning is issued and an
              opportunity to abort the upgrade of kdm is  provided.   If  this
              option  is  disabled  (the  Debian  default), kdm will be not be
              stopped  or  started  during  an   install   or   upgrade;   the
              administrator  will have to do so by hand (with '/etc/init.d/kdm
              restart', or by rebooting the system) before the newly installed
              kdm binary is used.

              If  this  option  is  enabled  (the Debian default), the sessreg
              program will be invoked to register X sessions managed by kdm in
              the utmp and wtmp files.  Otherwise, it is not, and the utmp and
              wtmp files will have no record of kdm sessions.

       Users of older versions of the  Debian  system  should  note  that  the
       'run-xconsole'   option   has   been   removed.   Shell  scripts  named
       /etc/kde4/kdm/Xsetup and /etc/kde4/kdm/Xreset can be edited to  disable
       or  modify  the  running of xconsole on the kdm greeter screen; see the
       kdm manual page for more information.


       This manpage was written by Branden Robinson for the Debian Project.


       sessreg(1x), xmessage(1x), kdm(1x)