I have the same problem, but Images appears on some device of mine.
xandr is not installed, o I looked in /boot/boot.ini but with no results
( the file is read-only mode so we need to remount it correctly, then reboot the odroid )
I tried this :
mount -o remount, rw /boot
// I unquoted the line "setenv videoconfig "drm_kms_helper.edid_firmware=edid/800x480.bin"
but the screen is still blank, and I dont find a log somewhere, where it is located ?