Special device under ACPI bus + CreateDeviceAccessInstance fails

Question

I am porting my existing custom device driver on Win8 and making a sample Metro App to communicate with device. I have gone through the BUILD conference video and other related material. Following are the steps and issue faced.

Driver part:

1) Converted the older WDK project to compile with VS2011.

2) Added code (IoSetDeviceInterfacePropertyData) to make device interface restricted.

Metro App:

1) Downloaded MoFx2App

2) Changed the application manifest and code (backend + frontend) to use my driver's GUID (just to check wheter driver opens or not)

Device Metadata:

1) Created device metadata using VS2011.

2) Added the Metro App in the list of previledge application.

 

Issue:

Device is enumerated successfully, but CreateDeviceAccessInstance returns failure(Access Denied). Prints that device metadata does not list any application.

Is there any step missing? How does the Metro App know which device metadata file to use?

Thanks

Answer 1

I have verified that device interface path is coming correctly when device is enumerated. I have also verified that device metadata file is propererly copied (installed) in the metadatastore.

Answer 2

I have the same issue, looking for it!!

Answer 3

Hi U_K,

If your sample is simpler than the MoFx2App and if it is not confidential, can you send me a copy of your code?

Thanks,

Answer 4

Can you send me your metro style app sample?

Answer 5

P.Akial, Carl Bao,

I have not written the new app. I have just changed the MoFx2App to communicate with my device.

Thanks

Answer 6

We meet same issue, look for it.

How to make ACPI device driver for Metro style app? 

Currently we cannot access our  ACPI device from Metro style app.

Answer 7

Herry.guo

We are waiting for the official documentation from Microsoft. Please see following link for more information.

http://social.msdn.microsoft.com/Forums/en-US/tailoringappsfordevices/thread/9e6b4d90-8a84-4f42-929e-dffdbd627c87/