Reini,
Your problem with video modes is simple:
24 bit depth screens have to be a multiple of 4 pixels wide, for alignment
purposes. Cygwin/XFree86 must trim the specified screen width when you
specify a screen width greater than the largest client area allowed for a
window. Cygwin/XFree86 does not currently ensure that 24 bit screens are a
multiple of 4 pixels wide after trimming the width.
Workaround: specify a screen width on the command line that is a multiple of
4 pixels wide and that will not result in automatic trimming. (e.g. -screen
1024x768x24 on a 1280x1024x24 screen)
Let us know if that works,
Harold
