You’ve surely read this article on the topic, which describes a long (and arduous) process to set up dual monitors on an Ubuntu system with a lowly graphics chip such as the Intel 945GM.
However, there is a much easier option which is outlined here:
For my system, all I had to was add the bold line in /etc/X11/xorg.conf
Section "Screen" Identifier "Default Screen" Device "Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller" Monitor "Generic Monitor" DefaultDepth 24 SubSection "Display" Modes "1280x800" **Virtual 2048 2048** EndSubSection EndSection
I then “activate” the secondary monitor with the command:
**xrandr --output LVDS --below VGA**
There is a 2048 pixel limit for the height and the width of the total display. For me that’s no problem as I have a vertical setup (secondary screen ABOVE notebook screen), but your mileage may vary if you need the screens side-by-side.
Jeremy: Stuart, I just got a P2370 and I can't get it to do 1920x1080 for the life of me. I just want to turn off the laptop display and use the Samsung. Any help is GREATLY appreciated.
Stuart: Worked perfectly for me. Toshiba Satellite A135 (Intel 945GM) with a Samsung 23" P2370 at 1920x1080. Thanks!