I have a UMDF video driver based upon the IddCx sample. I have a command-line test that calls CreateFile on a video adapter device instance to get a handle to it for IOCTL purposes. The test fails on the CreateFile call with Access Denied I discovered that if I simply disable and re-enable the adapter ..
I got a problem when I developed the WBDI and EngineAdapter with my fingerprint module on Win10 OS. The problem is why the EngineAdapter doesn’t go into below callback functions, after I finished Step 1 and Step 2 below? Because the document of Microsoft mentioned that below functions will be called when enrollment workflow goes ..
I have developed a umdf2 driver and in some point it needs to communicate to a remote server to fetch some data. I am wondering is there any easy way (e.g. library) to do the http requests (GET, POST) in Windows user mode? I have never used winsock2 and I am not sure how easy/possible ..
I am able to successfully build a UMDF device driver. This However, when I am trying to install it on Windows 10 or running the Visual Studio Driver Verifier it says ‘A problem was encountered while attempting to add the driver to the store’. I am using VeriSign to Test Sign it. The Inf2Cat tool ..
We have WBF driver for win7. Will this same WBF driver will work for later version of windows i.e Windows 8,8.1 and 10 ? or do we need to recompile driver for all version of windows os? Sorry for this type of question. Source: Windows..
Can someone please suggest resources to learn Windows User Mode Driver Development. I am currently trying to write a user mode display driver and have a lot of issues. The Microsoft documentation does not really provide a way of learning how to write drivers, it is only really a reference. Any courses or tutorials that ..
When I am trying to create a Windows User Mode Driver, a lot of the functions ask for a variable of type HANDLE, I do not know how I am supposed to get a "handle" for the device in my driver. Does anyone know how to do this? Here is an example of a function ..
I am currently trying to write a Windows User Mode Display Driver using the UMDF2 framework. I know that the Direct3D runtime is supposed to load this driver (a .dll) and call specific exported functions from the dll but I am unsure of how to initialize the driver so that Direct3D knows to call the ..
We are working on WHQL Certification for fingerprint device. We are able to pass all the testcases except Fingerprint Reader Logo Tests. We get stuck at the point when the test prompt to "swipe finger to select sensor.." No response on scanning the finger on the reader. As mention in Fingerprint reader logo tests about ..
When I run the IndirectDisplay driver sample (https://github.com/microsoft/Windows-driver-samples/tree/master/video/IndirectDisplay) IddCxSwapChainSetDevice returns 0x887a0026. Visual Studio describes this as "The keyed mutex was abandoned." and looking online indicates that this is the DXGI_ERROR_ACCESS_LOST code. I can’t find any information on what would cause this. What would cause this "The keyed mutex was abandoned" error in an IddCx driver? ..