EDID - Extended Display Identification Data

This is a protocol where a display device can publish its capabilities to a video source. I.e. a TV  publishing its supported resolutions to a DVD Player. It is commonly encountered with HDMI. Note if you have a HDMI mixer, or HDMI extender, this may affect EDID. EDID - Extended Display Identification Data Managing a Display EDID on windows | NVIDIA Custom Resolution Utility (CRU) for windows EDID/DisplayID Writer  for Windows Linux: # Some systems support runtime EDID changes echo "edid/new_monitor.bin" > /sys/module/drm_kms_helper/parameters/edid_firmware # Trigger hotplug event echo 1 > /sys/kernel/debug/dri/0/HDMI-A-1/trigger_hotplug EDID Dongle with pasthrough - EVanlak Hdmi Edid Emulator Passthrough 3rd Generrtion Premium Aluminum Eliminated Emulator Adapter Work with Mac Thunderbolt to HDMI Switches/Extender/AV Receiver/Video Splitters 1080-3840x2160@60H