I use a notebook with the external monitor. The “Dell Ultrasharp 2515H” is connected over HDMI with my notebook. Sorry, my notebook didn’t have DisplayPort 🤔
My notebook with Intel graphics HD 4000 wasn’t the correct resolution of 2560×1440. You add a custom-defined resolution to the intel driver. Here you must confirm some alerts.
Please reboot your computer. Set the correct resolution and enjoy. 😍