Re: Modelines for Apple 30" LCD?
The most reliable means of capturing modelines for a display device is to start X with this command:
startx -- -logverbose 5
and then inspect your X log for the EDID section. Generally speaking, only the modelines in that EDID will work properly (if at all). I just so happen to have done this a few days ago when working on a separate issue. The Apple 30" display only natively supports two modelines, 2560x1600 and 1280x800. Here's the modeline for 1280x800:
Modeline "1280x800" 71 1280 1328 1360 1440 800 803 809 823