Question: Acrylic not working on Windows 10 2004

Basic information

I have just updated my Windows 10 to 2004 (19041.330).

This is a i7 7700HQ, GTX1060 laptop with Intel GPU driver(27.20.100.8280) and NVIDIA GPU driver(446.14).

Bug

On my computer

The Acrylic tab in XAML Controls Gallery app looks like

And the start menu, all UWP applications that uses acrylic are not working correctly.

However, the taskbar does work well.

Online reports

There are some related online reports,

1. Acrylic transparency not working
2. Acrylic Effects Not Working On Windows 10 Virtual Installation
3. Windows10任务栏透明的小研究

What I have tried

1. Turn on and off Settings app > Personalization > Colors > Transparency effects, and reboot several times(including first shutdown then boot).

2. Reinstall(update) Intel and NVIDIA GPU drivers.

3. Apply and unapply the following Windows Registry

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
"UseOLEDTaskbarTransparency"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm]
"ForceEffectMode"=dword:00000001

My guess

I am pretty sure that, no long ago, Acrylic works fine, but I could not remember when it broke.

According to the Doc on usability-and-adaptability. The system needs to satisfy the following requirements

1. When the user turns off transparency in Settings > Personalization > Color, which I have tried several times.
2. When Battery Saver mode is activated, which I am pretty sure that I am not in saver mode.
3. When the app runs on low-end hardware. Since Windows 7 needs to run winsat to determine whether aero effect can be applied, so I also run, and the score is 8.5, however, nothing has changed to the issue.

After a week of searching and experiments, I can still not find any useful information. Could anyone here help me out?

Sorry if this question is out of the range for this repo.

[StephenLPeters]

@DavidZhang73 Have you checked the Transparency Setting in Ease of Access > Display? I think it is the same setting exposed in multiple places, but I think its worth a try.

@codendone and @stevewri FYI.

[arcadepro]

Try changing the colour range in the driver control panel to limited then back to full rgb. Or pick some low resolution and revert back.

Performing this dance fixes it on Nvidia for me. I’m not sure of the exact remedy as I’ve just been experimenting with it today. I also don’t think it’s limited to build 2004 since I had it in prior builds and just disabled transparency rather than have the inconsistency.

The problem seems to be that the acrylic texture is not loading? or perhaps it’s failing to enumerate the correct texture format due to incorrect color data being returned? When this bug occurs the taskbar IS transparent but doesn’t have the textured milky appearance like it’s supposed to have. (action center and other apps are untextured during this bug; as if transparency is disabled)