have an integrated graphics on DELL latitude E6430
Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)

also had the problem

switching AccelMethod
in /usr/share/X11/xorg.conf.d/20-intel.conf

from "uxa" (which was necessary some time ago to fix an earlier bug)
back to the default 
+ restarting X

solved the problem.

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https://bugs.launchpad.net/bugs/1392198

Title:
  unity-control center does not start after upgrade to unicorn

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