The setting on the left is not the same as the one on the right. "Custom color" is like a master switch for both color temperature and all the other settings (brightness, saturation etc.). It doesn't exist in 2019.
2019 is basically "Custom Color = on" all the time. In 2019 you can enable manual control (same as 2020) or you can disable manual control and use auto (same as Color Temperature Control=off in 2020). Default is temp=6500K. There's no change in behaviour.
You can't really have monitor handle it and "leave the driver out of it". Pixels going from GPU are in some color space and it's using certain color temperature.
E.g. let's say that you have Windows SDR desktop and driver doesn't touch any pixels. Windows SDR desktop is sRGB space => color temperature is 6500K. This is why 6500K is default. That's the closest to "leaving the driver out of it"
I did say the naming is confusing - "auto"/"off" really means that GPU is handling color temperature and the monitor should do nothing. In the old Catalyst Control Center this used to be called "Use EDID for color temperature" or something like that.
"Custom color" is like a master switch for both color temperature and all the other settings (brightness, saturation etc.). It doesn't exist in 2019
Yes, but that would mean that the manual setting in 2019 is the "accurate setting", which is weird. Anything manual tells me its overwriting.
If the manual setting really is the "accurate color" in 2019, then you can say that twice:
I did say the naming is confusing
Especially if you read the description of the "color temp control" setting in 2020. It says when its active that it overwrites the monitors temp or something similar (I switched back to 2019). So by AMD's own definition, switching "color temp control" off should be the "accurate setting"
Still a problem with 20.12.1. With custom color off, Radeon settings overrides monitor settings. Have to enable custom color and disable color temperature control. That's not the worst part. The custom color setting doesn't save for me after a shutdown....
I can also confirm the existence of this irritating bug. I have Sapphire Pulse Radeon RX 580 GPU, and AMD 20.12.1 drivers. After each reboot I first have to ACTIVATE Custom Color, then DISABLE Color Temperature Control to achieve natural monitor display color.
I have this issue too. I enable "custom colour" and turn off "Temperature control" to get my desired effect. Then, after I play a game in fullscreen the "temperature control" setting has turned its self on again. This either shows in the settings as being ON, or even if it SAYS its OFF, it is definitely ON. I can see this difference if I toggle it ON and OFF.
I can't get it to stay off so I've just left it on. Very strange behaviour.
I experience this behaviour as well. Are you on the latest driver?
I have updated the driver to the latest and I also replaced my Vega with a 6800 XT at the same time and this has started.
Anyone knows is the GPU swap could be related with this behaviour? Before I would have Custom color ON, and Color temperature OFF and it would stay like that.
Now when I play a game and then return to desktop, Color temperature is being set ON before my eyes, even though the toggle in Adrenalin control panel stays to OFF.
As a sidenote, my monitor supports a DP 1.4 DSC connection, but while on Vega it would work without DSC since that GPU didn't support it. Now it works with DSC with my 6800XT.
Any chance this could be related as well?
Do you have it set differently in the game profile to the global profile? I have a profile assigned to Call of Duty and run the game in 'borderless window', when I click on the game window I can see the colour settings getting applied. When I click on another window (e.g. radeon software window) the colour settings revert to default.