Dell U2422H 23.8" 16:9 IPS Monitor - Manual (Page 77)

Operating the Monitor
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Activate the computer and the monitor to gain access to the OSD .
NOTE: The message may be slightly different according to the
connected input signal.
If either USB-C (U2422HE only), DisplayPort, or HDMI input is selected and the
corresponding cable is not connected, a floating dialog box as shown below
appears.
NOTE: The message may be slightly different according to the
connected input signal.
For U2422HE, When the monitor is under DP/HDMI input and a USB-C cable is
connected to a notebook that supports DP Alternate Mode, if
Auto Select for
USB-C (U2422HE only) is enabled, the following message appears:
See Troubleshooting for more information.