4 Replies Latest reply on May 12, 2017 3:01 PM by Intel Corporation

    UI Freeze (UWP + SharpDx)


      I have:

      Intel NUC6i7kyk (all drivers updated), graphics card: Intel Iris Pro Graphics 580

      Windows 10 Pro (latest updates)

      Monitor 4K Sharp PN-K322BH with touchscreen (also tried another monitors)

      Fullscreen UWP application (target 10.0; Build 14393)


      I draw one 3d model drawn by SharpDx. Very often, when I click Windows button to show start menu and click again to hide it, application becomes unresponsible - for a few seconds it doesn't receive touch, mouse and keyboard events. When this happens sometimes UI continue drawing, sometimes whole UI stops drawing (video: https://drive.google.com/file/d/0B1LIS8G55R7-cjR3aWpUWW1hY2s/view?usp=sharing)

      When I profile application while it freezes, i found that the main thread freezes at this line

      "SwapChain.Present(0, DXGI.PresentFlags.None);" . It becomes normal when I minimize/maximize application.

      This bug repeats on two similar PC, but not on my notebook.


      Also I found that when Start menu shows/hides there are little video lags in directx drawing.

      It is shown in this video (Helix Toolkit sample): https://drive.google.com/file/d/0B1LIS8G55R7-NkVfalFnNVcyVUE/view?usp=sharing

      The same application works find without lags on my notebook (GeForce GTX 1060): https://drive.google.com/file/d/0B1LIS8G55R7-elc3Qnlya3RhcUk/view?usp=sharing


      I think, that these two problems have common roots. What do you think could it be?

      Right now I can't publish sources, but can process any research actions.