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35a32c5
(Get the code!)
Forgot to add that the screen blanking is performed by setting the first 16 palette colors to black. However, if the VGA text mode is not restored back to the correct text mode, then more of the palette colors need to be set to black for screen blanking to occur.
If one runs usplash on the console, more that 16 palette colors need setting to black to clear the screen. However, without running usplash, only 16 palette colors need to be set to black. This suggests that usplash is returning the console back to a incorrect/different mode/setting when usplash exits.