Do all current Dell Monitors with a DisplayPort support audio output? In particular the the U2410.

The Reason for the question is that I own an ATI Radeon HD5850 Video Card and I am using the DisplayPort connection. I have installed the latest drivers (Catalyst 9.12) which mention "The ATI Catalyst 9.12 hotfix release adds support for DisplayPort audio for DisplayPort panels" The video card has its own HD Audio hardware. I have my 2.1 speaker system plugged into the 3.5mm audio output jack on the display.

Audio output works on the HDMI port. However the HDMI port is already in use with a video games console.

I have also raised this with my Video Card manufacturer, but need to confirm the U2410 is capable to output audio delivered to it via DisplayPort out of the 3.5mm stereo jack.