8. Testing Your Configuration
Once you have completed changing your XF86Config file, save it and your can now test your configuration :
root# > startx -- +xinerama
Hopefully you can now enjoy X with multiple partners... er that is, Monitors.
8.1. Configuring X to Start Xinerama Automatically
The easiest way to have X start up with the Xinerama extentions is to add an option in the "ServerFlags section. as follows:
Option "Xinerama" "true"
Now Xinerama should start every time you start X.