Nvidia resume from suspend corruption
----------
This test ensures the screen is not corrupted after resume from suspend on nvidia cards.

#. Ensure unity is running on a machine with a nvidia GPU using the proprietary nvidia driver
#. Put the machine to sleep
#. Resume the machine from sleep
#. Observe the area where the launcher would normally show

Outcome:
  The screen should not display any visual corruption once X is finished updating after a resume.
