You can enable xdmcp access to the local Xorg login manager.

Edit /etc/X11/xinit/xserverrc:

Change "-nolisten tcp" to "-listen tcp"

i.e. exec /usr/bin/X -listen tcp "$@"

Create /etc/lightdm/lightdm.conf:

[SeatDefaults]
greeter-session=lightdm-kde-greeter
user-session=kde-plasma
xserver-allow-tcp=true

[XDMCPServer]
enabled=true

Install Xnest:

$ sudo apt-get install xnest
$ Xnest :1 -query localhost

To change the Xnest resolution, use

$ Xnest :1 -query localhost -geometry 1800x1000
Advertisements