Modeline problem on the 1st generation Powerbook G4

[Vincent Lefevre <vincent@vinc17.org>]

I have my Titanium connected to an external CRT monitor and I use the
following modeline:

        Modeline        "1152x768" 86     1152 1284 1416 1536  768 770 775 800

I thought it corresponded to 86 Hz, but in fact I get 70 Hz only.
How can I get a frame rate higher than 80 Hz?

TIA,

-- 
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/> - 100%
validated (X)HTML - Acorn Risc PC, Yellow Pig 17, Championnat International
des Jeux Mathématiques et Logiques, TETRHEX, etc.
Work: CR INRIA - computer arithmetic / SPACES project at LORIA