Comment 4 for bug 36810

Adriaan: I think it is not within the limits, otherwise my screen would not say "cannot display mode". I cannot check, because my monitor cannot go into the menu without sync.

Paul: The external monitor is a TFT, connected by VGA. I don't understand what you say about the X server. Isn't a modeline the complete set of parameters? So in theory I should be able to use any VBE mode to override - the modeline completely controls the timings. In practice, not only the modeline controls the timings, but also some "leftover" from the old VBE mode. Do you have any more information that helps me to understand (and fix) the problem?

Just curious: Why do parameters not matter with internal TFTs?