Qubes Doesn't Detect Second Monitor (model T20C310LB)

Hello i have qubes4.0 installed with kde-plasma with kscreen installed…

my qubes doesnt detect the second monitor(model T20C310LB) when i plug it into hdmi port…
i tested with another one… a philips and it detected automatically… only the samsung t20c310lb qubes cant detect it.

what am i misssing? need help with this, thank you.