você não quer desabilitar o Plug and Play, você quer desabilitar o Display Data Channel (DDC)
On Microsoft Windows (Windows XP and newer), there is no software provided option to disable plug and play monitor detection. This causes problems with computer/monitor switching applications and causes computer games to select display resolutions higher than the monitor is physically capable of displaying resulting in a garbled display.
In these circumstances, it may be necessary to remove pin 12 from the monitor VGA cable, to disable plug and play monitor detection. This allows display resolution to be selected manually and not overridden when the display adapter is removed and reinserted or the KVM switch is operated.
o pino # é diferente dos conectores HDMI ou DVI.