How to set primary monitor in Kubuntu with AMD/ATI video card multiple monitors and fglrx driver?

view full story

http://askubuntu.com – I'm running Kubuntu 12.04 with the AMD proprietary video driver. I have a Radeon HD 6700 Series card with 3 monitors. One of the monitors is larger and physically placed in the middle. I want it to be the primary monitor. However, dialogs and various notifications always come up on the left-most monitor. Even the KDM login appears on this monitor. I prefer this to be on the middle monitor too. Anyone know how to fix this? Here's what I tried so far: # nano /etc/X11/xorg.conf I added Option "Primary" "true" to the section for that monitor as shown below: Section "Monitor" I (HowTos)