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       wdm.options - configuration options for WINGs display manager


       /etc/X11/wdm/wdm.options contains a set of flags that determine some of
       the behavior of the WINGs display manager wdm(1).

       /etc/X11/wdm/wdm.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:

              If  set,  this  option  will  cause  wdm  always  regenerate the
              contents of the session  menu  when  starting.   It  is  set  by
              default  but  should be disabled if you wish to manually specify
              the list of available window managers.

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

              Enable  this  option  with  caution on "production" machines; it
              causes the wdm 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 wdm
              causes immediate termination of any sessions it manages; in some
              situations  this  could  be an unwelcome surprise (for instance,
              for remote wdm 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 wdm’s executable
              on  the file system has no effect on the copy of wdm in memory).
              The wdm pre-removal script checks to see if the wdm process  has
              any  children; if it does, it is possible that someone’s session
              would be killed by stopping wdm, so a warning is issued  and  an
              opportunity  to  abort  the upgrade of wdm is provided.  If this
              option is disabled (the Debian default), wdm will be stopped and
              restarted  during  an install or upgrade only if the running wdm
              process is found to have no children.   In  the  event  the  wdm
              daemon is not stopped and restarted, the administrator will have
              to do so by hand (probably with "/etc/init.d/wdm restart", or by
              rebooting  the  system) before the newly installed wdm binary is

              This option opens an xconsole(1) client to catch  messages  that
              would  normally  go  to  the  Linux  virtual console and thus be
              missed in many cases by the user.  By default,  this  option  is
              only   supported   in   the   Xsetup   file   for   display   :0
              (/etc/X11/xdm/Xsetup_0), but any Xsetup script  may  use  it  if
              appropriately edited.

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


       Flags controlling wdm used to be kept in /etc/X11/config on  Debian/GNU
       Linux systems.


       sessreg(1), xconsole(1), xmessage(1), wdm(1)


       This  manpage  was written by Branden Robinson for Debian GNU/Linux and
       modified by Marcelo Magallon for wdm.