> I've NEVER EVER needed to put any modeline in any distro's xorg.conf, > and I do a LOT of testing with different distro versions, Xorg > versions, CRT and LCD displays, gfxchips and video drivers. Xorg > calculates the modelines it needs if it has any valid data about the > hardware. Usually EDID is sufficient. When not (e.g. invalid EDID), > all it needs is the display's HorizSync and VertRefresh ranges, and > the desired resolution. Well, not always. I found some combinations of displays and vieo cards making the system not read EDID/DDC. The rule is: If there is any problem with DDC/EDID, go with modelines. Another good thing with modelines is that if you have monitor with proprietary software to move and resize screen, you can compensate lack of it using modeline. An example of DDC incompatibility problem is Cordata monitor (800x600 only) and GeForce FX 5200. It starts with 1280x1024 resolution. If monitor is connected to my notebook (Intel 950), it is detected properly. If another monitor is connected to GeForce, everything is OK. Only this single particular combination, Cordata connected to GeForce, doesn't work. MCbx