Direct3D11CaptureFramePool.CreateCaptureSession throws E_ACCESSDENIED on some machines?

[23chi]

Hello.

I'm doing monitor capture with WGC (C++/WinRT). On my machine it works fine, but on a friend's machine it fails. We are both on Windows 11.

D3D11CreateDevice → OK
CreateDirect3D11DeviceFromDXGIDevice → OK
IGraphicsCaptureItemInterop::CreateForMonitor(hMon, ...) → OK
Direct3D11CaptureFramePool::CreateFreeThreaded(device, B8G8R8A8UIntNormalized, 2, size) → OK
framePool.CreateCaptureSession(item) → throws E_ACCESSDENIED (0x80070005)

GraphicsCaptureSession::IsSupported() returns true on the failing machines. The HRESULT is the only signal I get, and i'm not sure where to go from there.

What are the possible causes of E_ACCESSDENIED here?

Appreciate any help.

[robmikh]

Thanks for reporting this!

Could you share the build numbers of both machines? I'd love to know on which build it works and which build it doesn't.

On the machine where display capture doesn't work, does window capture work?

[robmikh]

As for when you can get access denied back, usually it's either because of a privacy setting or because of MDM. The privacy setting page can be found in the Settings app under Privacy and Security -> Screenshots and video recording. The MDM policy is "AllowScreenCapture".

[23chi]

Neither display capture nor window capture works on the affected machine.

My friend has 23H2, OS Build 22631.6199
interestingly, i tested it on another friend who coincidentally also has 23H2, OS Build 22631.6199, and got the same result (0x80070005)

I am running 25H2, OS Build 26200.8457
Also tested on another laptop running 25H2, OS Build 26200.8655, and didn't get any errors.

as for privacy settings, i've checked them and they're all enabled, so no problems there.

[23chi]

also not AAD/domain/workplace joined, and the AllowScreenCapture policy isn't present

[robmikh]

Hmmm, ok could you do the following:

1. Have an application create a window or monitor GraphicsCaptureItem and keep it alive.
2. Have a second application repro the failure.
3. Open TaskManager, go to the services page, and find a service starting with "CaptureService". Right click and select "Go to details"
4. TaskManager should not show you a highlighted svchost process, right click that and select "Create memory dump"
5. Open a feedback item in the Feedback Hub app and file new feedback with that dump attached.

Once you've done that, please let me know what you titled the feedback as along with any ID or link it gives you.

EDIT: Well... 22631.6199 is old enough that I'm unsure if the right breadcrumbs will be present. But it's worth checking.

[23chi]

I've just discovered that both friends were using Atlas OS (https://github.com/atlas-os/atlas). I've since tested on other Windows 11 versions and been unable to reproduce the issue, so i'm assuming it has something to do with that, although i'm not sure why Atlas OS would need to restrict the capturing of screen