how to work without EDID ?

Try this workaround to fake display capabilities: disp_cap_hack

I have a similar problem but the link is dead. Where could I find this hack and does it work with Krypton builds?

Quote from juramusger

I have a similar problem but the link is dead. Where could I find this hack and does it work with Krypton builds?

add the following line to autostart.sh

mount -o bind /storage/.config/disp_cap /sys/class/amhdmitx/amhdmitx0/disp_cap

then create a new blank file /storage/.config/disp_cap containing whichever of the following resolutions you want

480i60hz
480p60hz
576i50hz
576p50hz
720p60hz
1080i60hz
1080p60hz
720p50hz
1080i50hz
1080p30hz
1080p50hz
1080p25hz
1080p24hz
2160p30hz
2160p25hz
2160p24hz
2160p50hz420
2160p60hz420

Mine just has two resolutions in as below :

1080p50hz
1080p24hz

Not sure if it works in Krypton as I've not tested yet

I'm moving things to a new server. Correct link is now Index of /s805/utils/disp_cap_hack/

This will work in Krypton as well.

Thank you very much kszaq and ukdaveuk! I used all the lines that the TV would announce when live before the box boots and it works beautifully.

But a question arises: what about the fractional refresh rates? I know that they don't properly work as of yet in Krypton, but shouldn't they be broadcast by the TV in order to allow Kodi to change to them when this becomes possible? Your comprehensive list also does not include them.

EDIT: For others that might arrive here to fix similar problems: note that the zip from kszaq includes lines like "1080p" without a refresh rate (meaning @60hz). Those don't work on my A95x (S905X), but I had already found out before with "echo 1080p > /sys/class/display/mode". On my box at least I have to include the refresh rate in every resolution, just as in the list by ukdaveuk above.

juramusger The ZIP is for S805 and it contains "old style" disp_cap. This means that you need to change "1080p" to "1080p60hz" and "720p" to "720p60hz". I forgot to mention this.

Fractional refresh rates are set automatically on Amlogic when needed. E.g. when you play 23.976fps video and have 24Hz refresh rate set, the driver will automatically switch to 23.976Hz.

Quote from kszaq

juramusger The ZIP is for S805 and it contains "old style" disp_cap. This means that you need to change "1080p" to "1080p60hz" and "720p" to "720p60hz". I forgot to mention this.

Fractional refresh rates are set automatically on Amlogic when needed. E.g. when you play 23.976fps video and have 24Hz refresh rate set, the driver will automatically switch to 23.976Hz.

yes, I automatically added this in my disp_cap as I already knew about the "new style" from trial and error. then 5 minutes after posting the success I thought about it and edited my post so others might find the info more easily.

thank you for the answer concerning fractional refresh rates!