Samsung monitor & MacBook Pro m1

MacBook Pro m1 with Samsung 34' ultra wide the MB sees the the monitor but the monitor has no display, I need to unplug wait till the the monitor searches for a source input then I can access the menu (not before) select source input and hold when the right input is shown (DPI, HDMI 1 or HDMI2)and if I hold my tongue correct I might get display. This monitor works correctly when connected to my intel iMac