xorg (screen resolution) in F14

[reg at dwf.com]

For reasons that I don't need to go into here, I keep copies of
Fedora F6, F11, and F14 on different partitions of a disk.  I will
be adding F16 to this collection in the next few weeks.

But, in looking at my F14 installation, I note an X11 problem.
Im not sure who is maintaining the Feodra X11 these days
so Ill ask the question here.

My xorg.conf is the same for all of these installations, and the
mode line reads

    Modes   "1280x1024" "1024x768" "800x600" "640x480"

and older X11s chooses the "1280x1024" resolution as my default.

In F14 it chooses "1024x768" which screws up the screen organization
for testing software.

Now some quick experiments show that if I connect the monitor
directly to the computer (rather than thru the kvm), this works
fine with F14.  So it is the kvm that is causing the problem.  But the
kvm is too dumb to program in any other manner, so the question
is, is there a way to FORCE F14 to use the mode I want, or to SET
whatever variable it is using to determine that the higher resolution
is acceptable?

I have tried a few things (like only one thing on the Modes line) with
no success, so I'm looking for someone who knows more about the
internals of X11 than I do.
-- 
                                        Reg.Clemens
                                        reg at dwf.com