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How to display overlay through divice "/dev/graphics/fb1" ,without using V4L2?

Question asked by guo lei on Sep 23, 2015
Latest reply on Sep 27, 2015 by guo lei

Divice "/dev/graphics/fb1"  is a overlay buffer of "/dev/graphics/fb0".

I want to display a overlay image using fb1 on screen(fb0).But no matter what i write to fb1, there is no display on screen(fb0).

How to solve this problem. This bother me many day.