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Why does VR preview with the Oculus Rift not work anymore?

I recently tried to preview my project using the Oculus Rift DK2, but the VR Preview button was grayed out using the 0.6 Oculus runtime running in extended mode. I upgraded to the 0.8 runtime and it fixed the button being grayed out but every time I VR Preview it crashes. I also tried the 0.7 runtime with the same results.

Here is the crash report:

Access violation - code c0000005 (first/second chance not available) "" UE4Editor_RHI!FRHITexture2D::GetSizeY() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\rhi\public\rhiresources.h:446] UE4Editor_Engine!`FCanvas::Flush_GameThread'::`21'::EURCMacro_CanvasFlushSetupCommand::DoTask() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\userinterface\canvas.cpp:775] UE4Editor_Engine!TGraphTask<`FCanvas::Flush_GameThread'::`21'::EURCMacro_CanvasFlushSetupCommand>::ExecuteTask() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\public\async\taskgraphinterfaces.h:779] UE4Editor_Core!FTaskThread::ProcessTasks() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\async\taskgraph.cpp:539] UE4Editor_Core!FTaskThread::ProcessTasksUntilQuit() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\async\taskgraph.cpp:340] UE4Editor_RenderCore!RenderingThreadMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\rendercore\private\renderingthread.cpp:310] UE4Editor_RenderCore!FRenderingThread::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\rendercore\private\renderingthread.cpp:411] UE4Editor_Core!FRunnableThreadWin::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

Product Version: UE 4.9
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asked Oct 28 '15 at 08:59 PM in VR

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avatar image Q-bert505 Oct 29 '15 at 08:28 PM

Some additional information:

I am using the 4.9.2 build of the engine. I get the same results in a new project. I am using Windows 7 64 bit.

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All works fine for me.

My system:

Windows 7 x64

GeForce 750 Ti

NVIDIA drivers 358.78 (this is latest GameWorks driver with VR support and recommended for work with Oculus)

Oculus SDK

UE 4.9.2.

I played Showdown VR demo in "VR Preview" mode.

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answered Oct 30 '15 at 01:51 PM

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avatar image Q-bert505 Oct 30 '15 at 05:04 PM

Downloading the drivers worked great! Thank you very much for your assistance.

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