Just received the Monitor and spent over an hour with Dell Tech support over this issue to no avail. I am connecting a new ASUS laptop with NVIDIA graphic card to the Dell Monitor with the display port cable (mini-dp to dp) provided by Dell. The display is fine but the sound from my laptop is cut-off. I don't want the monitor to handle sound, it should come out of the laptop. Dell tech support wants me to try the HDMI connection and call them back. Will have to buy a cable for that. I don't know much about these new display port connectors, any help will be greatly appreciated.