Public bug reported:

I closed the lid of my laptop, and when I open it up to unlock the screen, it 
shows nothing except blurred screen with black and white dot mixed. But when I 
moved the mouse or push any key, the blurred screen disappeared.
My laptop uses a Core i5 460m CPU and NVIDIA GT425M graph card. But I haven't 
installed any graph card drive.
I use GNOME Clissic (No effects) environment.
My Ubuntu version is 12.04.1 LTS.

** Affects: ubuntu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1052771

Title:
  blurred screen

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