using laptop as second monitor?

[Mark Morschhäuser]

Hi,

I saw that windows software: http://www.maxivista.com/ and thought that the 
same effect can be done with X, because it works as client/server over the 
network and can use more than one monitor on one machine.
The only thing to do is to add an additional monitor (which points to the 
IP-address from the laptop) to the xorg.conf and configure the screen-entry 
to use both monitors (xinerama-like). 
 
I searched google and tldp for about five hours and asked this question on two 
forums but all I found were howtos for X-terminals or xinerama or general 
configurations or tools that only allow to use mouse+keyboard on both 
machines but don't extend the desktop over both machines (synergy, x2x, 
x2vnc)
 
X should provide all necessary features already. How can this be done?


Thanks in advance,

Mark