My 2024 14-inch MacBook Pro with an Apple M3 Pro chip, all updates applied, is connected to two Dell screens: Dell S2721DGF (screen 1) and Dell S2725DS (screen 2). Screen 1 is connected via an HDMI cable, and screen 2 is connected via an Apple USB-C to HDMI connector. Screen 2 will go into standby mode after a few minutes, no matter what I am doing at the time.
I have tried various resolutions and refresh rates to no avail.
When I swap screens 1 and 2 around, screen 2 shows the same behaviour. I connected the screens to a Windows laptop in the same configuration. The screen connected via USB-C to HDMI does not go into a low-power state.
What could the issue be?