If no second monitor is attached it disables TwinView with the new drivers (not my preferred behavior).
As it turns out I only have one monitor at the moment so I probably won't be able to debug this after all (for a while). Try e-mailing Nvidia and posting at http://forums.nvidia.com/ (If using an NV chipset.) -- Display Module in KDE System Settings "fails to load" [[Update: Only with nvidia twinview]] https://launchpad.net/bugs/39603 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs