I had to change my video driver in the config from "dtoverlay=vc4-kms-v3d-pi4" to dtoverlay=vc4-fkms-v3d.
Nobody mentioned it, because it shouldn't be necessary...
As far as I know (let me make something clear: I'm not a developer, I'm just an "ordinary" user) this tweak you mention is only necessary due to a bug with CEC PULSE EIGHT on KODI, see here:
- https://forum.recalbox.com/topic/23883/radpberry-pi4-kodi-black-screen-7-2/14
- https://forum.recalbox.com/topic/24211/maj-7-1-1-vers-7-2-1-bien-mieux-mais-pb-cec-pulse-eight
it freezes at the recalbox slpash screen
It may not be related to the composite cable, see here: