Adding a virtual screen to xorg.conf 11.04 (third display over vnc)

Solution 1:

There is a vnc module for X that can be installed which will provide the native :0 X display when connecting remotely with the vncviewer.

Install the "vnc4server" package (universe). This will provide "/usr/lib/xorg/modules/extensions/libvnc.so" (The vnc.so module for VNC 4.1.2 was changed from vnc.so to libvnc.so.)
Add "vnc" to the Module section in /etc/X11/xorg.conf
```
Section "Module"
    ...
    Load "vnc"
EndSection
```
- If your VNC server is running in a secure environment, you can disable authentication with the following configuration:
```
Section "Screen"
    ...
    Option "SecurityTypes" "None" 
EndSection
```
- If your VNC server is NOT running in a secure environment, you will need to set a VNC password using the vncpasswd program:
```
# vncpasswd
Password:
Verify:
```
  Then tell the VNC module where the password is stored in xorg.conf:
```
Section "Screen"
    ...
    Option "SecurityTypes" "VncAuth"
    Option "UserPasswdVerifier" "VncAuth"
    Option "PasswordFile" "/root/.vnc/passwd"
EndSection
```

Logout and restart X (Ctrl-Alt Backspace)

The Source http://ubuntuforums.org/archive/index.php/t-279069.html