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I managed to find a fix for the broken gamma, and nvidia dithering in windows 1903: you need to go to Task Scheduler > Microsoft > Windows > WindowsColorSystem, and delete the task called WindowsColorSystem Calibration Loader.
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This topic was modified 4 years, 9 months ago by A.ces.
AMD suffers it too. It’s an issue related to MS. Also no need to telete task, just disable it.
I’ve not tested yet if return-from-standby/night-mode banding issues get fixed once you disable this task.
Although I make that trick… sometimes that broad stair step banding is back. I could not find cause-effect, but I was using madVR fullscreen some time before I noticed it.
Yeah you need to sign in/out of windows multiple times, and check a gradient pattern each time, same happens if monitor/pc enters sleep.
I can confirm that disabling the “WindowsColorSystem\Calibration Loader” task (even if “Use Windows display calibration” in Windows color management settings wasn’t enabled to begin with, which is interesting) and logging out/back in solves the severe banding (but it may be back if changing the calibration, in which case the log out/in procedure needs to be repeated). We’ll have to wait for a proper fix from MS. I will probably add automatic disabling of the task upon installation in a DisplayCAL update to mitigate the problem until a proper fix comes in the form of a Windows 10 update.
Actually it seems there is still some banding in black region but it’s very hard to see, a reboot or two most of the time fixes it.
Only the severe banding (stripes) after the 1903 update is a problem. Other banding is normal.
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