I don't know if this will help, for 4K monitors that default to 4K (added to kernel cmd line)
drm.edid_firmware=edid/your_edid.bin .... your_edid replaced by 1920x1080.bin
the edid directory is in /lib/firmware
also,,, https://wiki.archlinux.org/title/Kernel_mode_setting
BTW, often edid's have errors, usually minor
drm.edid_firmware=edid/your_edid.bin .... your_edid replaced by 1920x1080.bin
the edid directory is in /lib/firmware
also,,, https://wiki.archlinux.org/title/Kernel_mode_setting
BTW, often edid's have errors, usually minor