Public bug reported:

Running 12.04 on three machines. On one of the machines I am running an
Intel 82G33/G31 Express Integrated Graphics Controller as a display
adapter with 64bit version of Ubuntu. On this particular machine the
grid of white dots overlaid on top of the wallpaper for the currently
selected user is messed up big time, however, the wallpaper itself looks
fine.

Once I move the mouse, the dot grid magically fixes itself. Then if I
select a new user the grid of dots is messed up again until I move the
mouse.

(Not sure how I can get a screenshot to show you)

Once I log in the graphics seem to be running fine.

** Affects: unity-greeter (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Running 12.04 on three machines. On one of the machines I am running an
  Intel 82G33/G31 Express Integrated Graphics Controller as a display
  adapter. On this particular machine the grid of white dots overlaid on
  top of the wallpaper for the currently selected user is messed up big
- time.
+ time, however, the wallpaper itself looks fine.
  
- Once I move the mouse, the graphics magically fix themselves. Then if I
+ Once I move the mouse, the dot grid magically fixes itself. Then if I
  select a new user the grid of dots is messed up again until I move the
  mouse.
  
  (Not sure how I can get a screenshot to show you)
  
  Once I log in the graphics seem to be running fine.

** Description changed:

  Running 12.04 on three machines. On one of the machines I am running an
  Intel 82G33/G31 Express Integrated Graphics Controller as a display
- adapter. On this particular machine the grid of white dots overlaid on
- top of the wallpaper for the currently selected user is messed up big
- time, however, the wallpaper itself looks fine.
+ adapter with 64bit version of Ubuntu. On this particular machine the
+ grid of white dots overlaid on top of the wallpaper for the currently
+ selected user is messed up big time, however, the wallpaper itself looks
+ fine.
  
  Once I move the mouse, the dot grid magically fixes itself. Then if I
  select a new user the grid of dots is messed up again until I move the
  mouse.
  
  (Not sure how I can get a screenshot to show you)
  
  Once I log in the graphics seem to be running fine.

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https://bugs.launchpad.net/bugs/993366

Title:
  Unity greeter login screen has a garbled white dot grid

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