Questions tagged [iddcx]
4 questions
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1 answer
IddCx Driver frame stutters, potentially caused by OS version issues
I am working on a IddCx indirect Display Driver. I have run into a bug that I cant find any reason to blame my own code on. Every two seconds or so IddCxSwapChainReleaseAndAcquireBuffer takes over 100ms, up to 8000ms to complete. It normally takes…
vulkur
- 21
- 5
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1 answer
IddCX header results in errors for pure C compilation
I am trying to use pure C for a windows driver I am working on. Its a driver using IddCx (um/iddcx/iddcx.h). This header has a 'extern "c"` wrapper to allow for C compilation. The issue is the code within the 'extern "C"' block is not C. I get these…
vulkur
- 21
- 5
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Using IOCTL_VIDEO_QUERY_AVAIL_MODES to get a list of modes supported by a video adapter
I'm trying to query a list of supported modes from a video adapter driver:
// IOCTL_VIDEO_QUERY_NUM_AVAIL_MODES - Retrieve the count of modes on the display adapter
// Input-Buffer: none
// Output-Buffer: VIDEO_NUM_MODES
VIDEO_NUM_MODES…
Scott Smith
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2 answers
"A mismatch between the PNP/INF version and the KMD file version on the graphics adapter has been detected"
I've been testing a UMDF IddCx video driver, and this message just started appearing (after devcon.exe install ...) along with a breakpoint in WinDbg:
(DriverEntry and EVT_WDF_DRIVER_DEVICE_ADD handlers succeed as they did prior to this error…
Scott Smith
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- 2
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- 63