[Rumpelstiltskin]

Thanks for ur replay,

I followed your guide at post 1793

I have two hdmi output, one is linked into HDMI3 in my TV and the second in BD-DVD in my onkyo.
This is the output for ls -la in /sys/class/drm/card0*

i tried : 
/sys/class/drm/card0-HDMI-A-1/edid 

and 

/sys/class/drm/card0-HDMI-A-2/edid
 cat /etc/initramfs-tools/hooks/include-edid-data | pastebinit

Do you have another idea to advise me ?

One more thing : when i do sudo update-initramfs -u i get this strange warning :
 

@nucbox:~$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.16.3-041603-generic
I: The initramfs will attempt to resume from /dev/sdc3
I: (UUID=cca4de02-4a74-11e8-b920-94c6911ca100)
I: Set the RESUME variable to override this.

I attach the dmesg LOG