(framebuffer-clear! framebuffer)
The framebuffer is cleared to “all black” and the invisible graphical cursor is set to its origin (0,0).
unspecified (ok)
> f
#<framebuffer device:/dev/fb0 width:1600 height:900 cursor:100,200 lh:0 bpp:32 fd:3>
> (framebuffer-width f)
1600
> (framebuffer-clear! f)
ok
> f
#<framebuffer device:/dev/fb0 width:1600 height:900 cursor:0,0 lh:0 bpp:32 fd:3>
>