To complicate matters, this does appear to be the combination of PowerDVD and the Radeon GPU in the system. As I have another system available I can try the following combinations:
PowerDVD + Radeon 6800XT + Samsung Q9FN over HDMI = FAIL (limited range)
PowerDVD + Radeon 6800XT + Dell U2515 over Displayport = FAIL (limited range)
Leawo + Radeon 6800XT + Samsung Q9FN over HDMI = PASS (correct dynamic range)
PowerDVD + Nvidia 3060Ti + Samsung Q9FN over HDMI = PASS (correct dynamic range)
On the primary system, the display format is configured correctly to full range RGB 4:4:4 in the Radeon software. And to be clear, the competitor software works correctly - it is displaying what looks like the full dynamic range. It's not something to do with the HDMI connection either, as the same issue is there if I switch to a PC monitor.
If I didn't have another system to test with, I'd just conclude that PowerDVD does not work as expected at all - however, it does display the correct black levels when combined with an Nvidia GPU.
I hope that this makes sense - the specfic combination of PowerDVD 21 (latest 21.0.2019.62 version) and the Radeon GPU (running latest 21.12.1 driver) on Windows 10 Pro 21H1 - does not display the correct black levels.
Has anyone else been able to get correct dynamic range on one of the newer Radeon RX series cards with PowerDVD? Why would the horrible Leawo software not be affected?
(EDIT - TrueTheater video enhancements are disabled / Video playback settings in Radeon software is default)
This message was edited 1 time. Last update was at Dec 06. 2021 12:55