Our lab environment was set up on 4.4.10, then upgraded to 4.5, and our production environment was a clean install of 4.5. In our lab environment, I remember having to alter a setting back in 4.4.10 through 'engine-config' or other to get the multiple monitor option to cooperate in the VM settings. I googled around for the original article that allowed me to fix this on 4.4.10, but I cannot find what I had earlier. On the lab environment, the VM displays behave as expected; X starts and the second display becomes available in virt-viewer. In our production environment, same configurations, OS, etcetera on the VM, but X starts and the second display is still not available.