Introduction - If you have any usage issues, please Google them yourself
FrameBuffer is not a graphics system, nor is it a windows system. It is lower than X, FrameBuffer is simply a mechanism to achieve. This mechanism is to map each point of the screen into a linear memory space, the program can simply change the value of this memory to change the color of a point on the screen. X's high degree of portability comes from this mechanism, regardless of the graphical environment, as long as the implementation of this mechanism can be implemented X. So in almost all platforms have a corresponding X version of the transplant.