You will need to use AMD's configuration tool for setting up the config you want, because it will require using Xinerama. The GNOME display properties tool only works for displays connected to a single video card; it can't do multi-card spanning.
If you need technical support for setting this up, the kind folks at askubuntu.com should be able to help guide you through using amdcccle to create your configuration.
Hi Alex,
You will need to use AMD's configuration tool for setting up the config you want, because it will require using Xinerama. The GNOME display properties tool only works for displays connected to a single video card; it can't do multi-card spanning.
If you need technical support for setting this up, the kind folks at askubuntu.com should be able to help guide you through using amdcccle to create your configuration.