Display worked at first, but after a few reboots now dmesg reports this error and the display is no longer working.
Code:
[D] evdi_detect (dev=1) Painter is connected
[D] evdi_painter_get_edid (dev=1) 54 c4 ff
evdi evdi.0: DVI-I-1: EDID invalid.
This is an HP Envy laptop. While I appreciate there is a support tool to dump more info, this is a work computer which cannot have its debug info publicly disclosed.