If somebody is still looking here ...
I tried both ways and I always fall "out of scan range"
when I applied the changes. It is strange though that
Sax2 accepts happily 1600x1200, 800x600, 640x480
but NOT 1024x768 or 1280x1024. My monitor freq ranges
are quite wide and I do not think that this causes the
problem. I tried to change the aspect ration from 4/3
to 5/4 but this seems to be a passive setting.
Any further ideas/help are highly appreciated
ps. One may wonder why I want to move to a lower resolution.
This is for compatibility with my School settings.
e.g. when I use VNC viewer the letters on the topbars
of the applications look too small because my monitor
is running at 105dpi instead of 72 or 96.