After trying a few more things, using an old HDMI splitter 1x2 as a "conversion box" seems to do the trick and disable Dolby Vision permanently. Time will tell...
Found this thread after noticing the same problem on my system, Dolby Vision is on all the time and the picture is horrible. I tried a few things to correct the problem but none so far are as easy as having the thing work correctly out of the box. Tu...
