Getting EDID of your monitor on mainline Linux for Unsupported Resolutions or Black Screen
The EDID of your monitor can be found in the file here: /sys/devices/platform/soc/d0100000.vpu/drm/card0/card0-HDMI-A-1/edid
It is in binary format so you can't cat it to console. You can use xxd instead.
xxd /sys/devices/platform/soc/d0100000.vpu/drm/card0/card0-HDMI-A-1/edid
This is useful if you are unable to get video output on your monitor. You can decode your monitor's EDID via get-edid in the read-edid package.
sudo apt-get install -y read-edid
parse-edid < /sys/devices/platform/soc/d0100000.vpu/drm/card0/card0-HDMI-A-1/edid
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