Grab this hacked version of your EDID
Then copy it into /lib/firmware/
sudo cp LGC8-DVnoLL.bin /lib/firmware/edid
Reboot and see if you get DV.
Grab this hacked version of your EDID
Then copy it into /lib/firmware/
sudo cp LGC8-DVnoLL.bin /lib/firmware/edid
Reboot and see if you get DV.