I have tested Ubuntu 14.04 and Xubuntu 14.04 and in both cases I had issues with installing the latest nvidia driver from nvidia.com and also with being able to perform a scheduled shutdown using a GUI shutdown timer or from the command line/terminal with sudo shutdown -h ..... I also used software like Qshutdown and EasyShutdown but with no success so far.
I know there is a solution for installing upstream drivers directly from AMD's website on this page but there is nothing similar for Nvidia. I can't just use nvidia-173 Ubuntu driver because it comes with the wrong version for nvidia-settings, namely nvidia-settings version 304 or version 331. Can't adjust resolution, monitor frequency or use Power Mizer unless I try this unusual solution. This goes for Ubuntu 12.04 as well as for Ubuntu 13.10 but at least with those releases I was able to install the latest video driver from Nvidia.com.
I noticed that nvidia-173 driver package present in Ubuntu 14.04 repositories can be activated only because it uses a patch to match Ubuntu 14.04 most famous kernel, and I was wondering if there are more patches like this one available out there to allow me to install the same software I used successfully in Ubuntu 12.04 or Ubuntu 13.10 including my video drivers from nvidia.com.
And I need to be able to schedule a complete shutdown (using the terminal emulator or some application like EasyShutdown or Qshutdown) without having to install kde shutdown utilities and a lot of other packages needed to run kde applications. Shutdown works only after installing these kde extra packages in Xubuntu 14.04.