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screen goes black while mouse move

Question asked by lin zhang on Jun 2, 2016
Latest reply on Jun 5, 2016 by lin zhang

a problem of display.

 

 

I have done following steps to overlay fb1 on fb0:

1. set the geometry of fb1 to fb0's geometry(ioctl(FBIOPUT_VSCREENINFO)).

2. call ioctl(MXCFB_SET_LOC_ALPHA) on fb1:

    l_alpha.enable = 1;

    l_alpha.alpha_in_pixel = 0;

3. output images to fb1's non-transparent area.

after those, I found that the screen goes black while moving mouse.

if moving stopped, the screen come back, images and controls will display.

how can I fix this bug?

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