Dell U3014 User Manual page 57

OSD Warning Messagess
When the Energy Smart or Dynamic Contrast feature is enabled (in these preset modes: Game or Movie), the manual brightness adjustment is disabled.
When the monitor does not support a particular resolution mode you will see the following message:
This means that the monitor cannot synchronize with the signal that it is receiving from the computer. See
ranges addressable by this monitor. Recommended mode is 2560 x 1600.
You will see the following message before the DDC/CI function is disabled.
Monitor Specifications for the Horizontal and Vertical frequency