Thanks! I have seen in pkg a programm which we all know and
wanted!

nvidia-settings
from the ReadMe:
This version of the drivers does not by default allow stereo to be used with Digital flat panels or other DVI display devices. This was because the pixels of such devices in many cases are not able to respond ata sufficient rate.
To override this behavior, the following option in the XFree86Config file should be used:
Option "AllowDFPStereo" "boolean"
By default, the NVIDIA X driver performs a check which
disables active stereo (stereo options 1, 2, and 3)
if the X screen is driving a DFP. The "AllowDFPStereo"
option bypasses this check.
Will try it with my ut2044 demo bench and others.
Marcus