Linux has faster solutions than VNC.
Let's assume your Tower PC is starting in graphical mode, and is running GDM, or KDM, or XDM (the place where you enter the login and the password).
In this situation, make sure the login manager you use is configured to accept remote connections (XDMCP), or if you don't know how... try your luck
Next, on your laptop, instead of starting in graphical mode, start in text-mode. Login, and immediately start this command:
Code:
X -query Tower.PC.IP.Adress -once
Then you should be presented with the TowerPC login screen.
If this configuration suits you, you can make it better by making it start on boot, thus avoiding the double login.
You can even configure LILO, so that on boot of your laptop, you're given the choice between normal local (laptop) use, or remote display of the TowerPC.
Yves.