After some days of research and trying to put this to work i did finally made this work for me.
This guide requires the same steps i have done to fully work!
Guide for 240Hz Monitor Override with custom EDID
Fresh installation of EndeavourOS was done, distro KDE PLASMA.
Bootloader : Grub-bootloader, I DO NOT KNOW if with defaultbootloader works!
This guide is specifically for the G80SD model (3840x2160 - 240Hz - VA - FreeSync Premium PRO - FreeSync range 60-240Hz - HDR/HDR10+).
Step 1:
Copy your custom edid to the firmware directory using “open as admin right click” and paste.
sudo cp g80.bin /usr/lib/firmware/edid/g80.bin
Edit the initramfs configuration file:
sudo nano /etc/mkinitcpio.conf
Add the EDID path to the FILES array:
FILES=(/usr/lib/firmware/edid/g80.bin)
Regenerate the initramfs:
sudo mkinitcpio -P
This step, editing can be done traditional way by editing via notepad. For those that doesn’t want to use console. Regenerating must be done on console.
Quick logout and re-log for step 2.
Step 2:
Edit the GRUB configuration file:
sudo nano /etc/default/grub
Add the following parameter to GRUB_CMDLINE_LINUX_DEFAULT:
drm.edid_firmware=DP-1:edid/g80.bin
!!(EnsureDP-1 is your actual Display-Port connector, otherwise change it; this METHOD requires a Display-Port connection)!!!
DO NOT DELETE THE PER-EXISTING CODE IN THERE. (also my failure on previous attempts)
Regenerate the bootloader configuration:
sudo grub-mkconfig -o /boot/grub/grub.cfg
Make sure BEFORE you proceed your monitor is up-to-date.
This method uses the full potential from your screen.
Additional notes:
The G80SD is a matte coated display that has vaporchamber cooling solution and allow you to hack on the service menu increasing the potential of HDR. !!This might void your warranty!!
This monitor also has several ways of using HDR, either with HDR on basic (more native colors) or with HDR OFF (more accurate colors) . The HDR OFF does not turns off HDR but works without HGIG in a different way. i have tested both methods and i prefear a more accurate state of image.
What i have won with the change to EndeavourOS:
More colorful, games look so crisp.
HDR full support, that is why i bought this monitor too.
Stability with 7900XTX EVC MOD to reach 3400MHZ Clocks / 2800 Mem (samsung mem required)
I HOPE, really, that this will help more people to make the jump after being so long windows users as i was. Never going back, ever.
Any questions i am happy to answer, further contact besides this forum E-mail