Description

Why does the background change to another color when a GPU layer is enabled?

For example, why does the background change from black to grey when the GPU layer is enabled?

Solution

• Make sure that the global alpha enable bit for the graphics layer is disabled, which is bit 1 of address 0x110, 0x120, 0x130, etc.
  It should not be set if that layer is a graphics controller.
   
• The first entry in the color table should always be 0x00000000. 
  This ensures that the background of the graphics layer has an alpha value of 0x00 and should not blend.

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