Dell S2421H User Manual page 22

DDM may not work with below displays:
• Dell display models earlier than year 2013 and D-series of Dell displays. For more
information see
• Gaming displays using Nvidia-based G-sync technology
• Virtual and wireless displays do not support DDC/CI
• Some early models of DP 1.2 displays, it may be necessary to disable MST/DP 1.2 using
the display OSD
If your PC is connected to the Internet, you will be prompted to upgrade to a newer version of
DDM when it is available. It is recommended to download and install the latest DDM application.
You may also check for new version by right clicking on DDM icon while pressing and holding
'shift' key.
22 | Troubleshooting
www.dell.com/support/monitors.