Wow, desktop extended, can have more icon to put, can manipulate files at *large* screen…

1) open a terminal, type xrandr to check your display configuration, see image below:

NOTE : based on the result, maximum resolution to display = 2048 x 768 and 2 output is currently connected, which is VGA-0 and DVI-0, ok, note it down, it’s needed to edit xorg.conf file.

2) create a copy of /etc/X11/xorg.conf as xorg.conf.ori for backup purposes.

3) edit xorg.conf as example below :

# Xorg configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us+inet"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "FLATRON 775FT"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "FLATRON 775FT"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "RightOf" "Monitor0"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "radeon"
Option "Monitor-VGA-0" "Monitor0"
Option "Monitor-DVI-0" "Monitor1"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Virtual 2048 768
Depth 24
Modes "1024x768"
EndSubSection
EndSection

# End Xorg configuration created by pyxf86config

4) Few thing here you need to aware of (for those keyword in red colour), and need to change accordingly your hardware:

• RightOf – its a identifier which determine where your 2nd screen to display, other usable keywords are , “LeftOf” , “Above”, “Below”. In this case: monitor1 is RightOf monitor0
• VGA-0 and DVI-0 – there are output connected to your monitor.
• 2048 768 – It is maximum resolution for your Virtual configuration.
  

P/S : From my understanding after doing these, I think we just created a virtual screen which has big resolution(2048×768) and so, we can view it as twin screen as both screen will get 1024×768 individually.
Please correct me, if I’m wrong 🙂