is it possible to have a duplicate output, both on HDMI and LVDS together?
Same screen on both ports to have a dual screen with duplicate output.

i have also connected the LVDS monitor to the 2x10 pin header, but there is no output even if no HDMI connected to the board.

OS: FriendlyCore
SBC: smart4418 with smart4418/smart6818 SDK v2.1

Thank you for your kind help.