A1200 works with Dell SR2320L w/o FF/SD!

[zipper]

Yes,
> Horizontal scan range 30 kHz to 83 kHz (automatic)
> Vertical scan range 56 Hz to 76 Hz (automatic)
Odd, but in a nice way!

[zipper]

To my big astonishment I could today get my BenQ FFP222Wa to show picture at even 320x200@60 Hz. It's specced as 30 - 82 kHz, 56 - 76 Hz. Actually it does as low as 44 Hz but until today I never got it to show a pic under 320x400. Perhaps the latest NVidia drivers made it now possible to show 320x256, 320x240 and 320x200, too. So now it did show bearable picture at 15 kHz.

[zipper]

Weird that DoublePAL doesn't work. Do you have VGAOnly in Devs:Monitors? There are a few screenmode editing utils on Aminet - you could probably get it working by tweaking it with one of those.

Probably just because of missing VGAOnly - DblPal is so low and DblNtsc a little bit higher but probably just enough to work. Wasn't DblPal just a little over 28 kHz?
...check - DBLPAL 27.50 kHz 48 Hz with VGAOnly: 29.45 kHz 50 Hz