@tonificante I've checked and there are no other updates.type line.
I have a doubt about my test procedure: because it was more convenient, no need to restart with each change, I assumed that executing the /recalbox/scripts/recalbox-upgrade.sh script was doing the same thing as the automatic update check ... but by reading the script content, I don't see how it could work by specifying a URL instead of the update type.
@Substring Thanks for your works, outputs by HDMI work well now on my hardware