[Sorry if this is a duplicate, I think it was rejected because it
 came from an address different from my subscription.]

The following works for me under 3.01:

% cat hello9.ml 
let _ =
  Graphics.open_graph ":0.0 300x500";
  Graphics.set_window_title "Hello, world";
  Graphics.moveto 150 250;
  Graphics.draw_string "Hello, world";
  ignore (Graphics.read_key ())
% ocamlc graphics.cma hello9.ml
File "hello9.ml", line 6, characters 2-21:
Unbound value Graphics.open_graph
%

I'm running the ocaml-3.02-1 RPM.
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