Your existing X session will be locked automatically (via the screensaver) and can be
unlocked with your password when you switch back to the original VT. If you don??™t
want this automatic locking, add the -l option to the preceding command line.
gdmflexiserver can also start a nested X server (using Xnest) and present a session
login prompt there:
$ gdmflexiserver -n
Starting Additional X Servers Using KDM
Although it doesn??™t provide a command-line interface, KDM can start new sessions.
Before you can use this, you must edit the kdmrc file. In the [General] section, add a
line that specifies some reserve servers:
ReserveServers=:3,:4,:5
If you also have a StaticServers line (Section 2.7), make sure that no display numbers
appear in both lists.
In order to start a reserve server, you must be running KDE as the desktop environment
(this isn??™t a given, since you can run any desktop using any display manager).
Select ???Start new Session??? from the Switch User menu group on the K Menu, and a
new X server will start with a session login prompt. If you lock your session (either
using the menu option or by configuring session locking for the KDE screensaver), a
???Start new Session??? button will appear on the locked-screen password dialog as well.
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