Dell C2722DE 27" 16:9 IPS Video Conferencing Monitor - Manual (Page 82)

82 | Operating the monitor
OSD warning messages
When the monitor does not support a particular resolution mode, you can see the
following message:
The current input timing is not supported by the monitor display.
Please change your input timing to 1920x1080/2560x1440/3440x1440, 60Hz
or any other monitor listed timing as per monitor specifications.
This means that the monitor cannot synchronize with the signal that it is receiving
from the computer. See
Monitor Specifications for the Horizontal and Vertical
frequency ranges addressable by this monitor. Recommended mode is 1920 x 1080
(C2422HE) / 2560 x 1440 (C2722DE) / 3440 x 1440 (C3422WE) .
You can see the following message before the DDC/CI function is disabled:
The function of adjusting display setting using PC application will be
disabled.
Do you wish to disable DDC/CI function?
Yes
No
When the monitor enters the Standby mode, the following message will appear:
Going into Standby mode...
Activate the computer and wake up the monitor to gain access to the OSD .