Thanks, I have changed to that and the message "Please use Ultra High speed 48Gbps HDMI cables for 8K" shows on my Denon. Is that the message you are referring to that no longe appears?Before updating:
Both enhanced format and enhanced format (dolby vision) gave the msg.
If signal format on my Sony is set to enhanced format (dolby vision) i get the same msg. When i change it to just enhanced format i don't get the msg when choosing "Enhanced 8K" on the Denon.
For both, the Sony (HDMI 3) is connected to the Denon (Monitor 1) using the same Ultra High Speed 48gbps cable.