Follow the steps below to enable USB power delivery in standby mode to get rid of the notice:
- OSD menu > System > USB-C Awake > ON (PD3420Q/PD2705Q/PD2705U/PD3205U/SW270C/SW321C/SW271C/EX480UZ/PD2705UA/PD3205UA/PD2706U/PD2706UA)
- OSD menu > System > USB Awake > ON (PD3200U/PD3200Q/PD2700U)
- OSD menu > System > Power Awake > Thunderbolt3 / USB > ON (PD3220U/PD2720U/PD2725U/PD2506Q)
- OSD menu > System > Quick Awake > ON (SW272U/SW272Q)
Note: the monitor is a passive device and won't supply power actively to USB devices except required USB accessories.