[noggin]

I think you may have your clips mixed up Noggin, the Scaling test is the one with the Vertical and Horizontal Lines.

Only time I saw anything out of the ordinary was the 2160p25 - 4ktest_red_border test clip displayed at 2160p60Hz. I could not read the Purple text like I was able to displaying it at 2160p50hz.

Yes - in editing my post I'd cut and pasted the wrong descriptions.

Looked pretty clean otherwise, and besides you would not be displaying video at the wrong refresh rates with Kodi Dynamic refresh switching working to sort it all out correctly anyway.

I think you're missing my point re disabling dynamic refresh rate.

To force 2160p content to be displayed downscaled at 1080p over an HDMI connection to a 2160p-capable display you have to forcefully disable Kodi's dynamic refresh rate switching. If you leave it enabled, fritsch's clever 'chose 2160p if playing 2160p content, even if the output resolution is set to 1080p' code kicks in I think. (Except it then gets confused)