I use an X11 configuration with 2 computers. First computer for flight model and instruments (main). Second computer for additional front screens (slave).
When I try flying at night and put external lights on (nav light, land lights, nose lights), it works correctly on the main computer, but it works only with strong flickering on rhe slave computer. Not usable.
Is there additional data which has to be transmitted between the 2 computers ? I did not find any label on this topic in the send data menu.