We don't have to update a backlight status every time a
blanking or unblanking event comes because the backlight
status may have already been what we want. Another thought
is that one backlight device may be shared by multiple
framebuffers. We don't hope blanking one of the framebuffers
may turn
We don't have to update a backlight status every time a
blanking or unblanking event comes because the backlight
status may have already been what we want. Another thought
is that one backlight device may be shared by multiple
framebuffers. We don't hope blanking one of the framebuffers
may turn
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