[4.13] Lockup when using HTC Vive

With the latest version , 4.13, I’m getting a lockup whenever I launch the VR preview. The display on my Vive becomes unresponsive and just displays my home grid frozen in one position (no head tracking working). When I close the preview, the problem persists and the SteamVR menu displays in red “unresponsive”. When I then close SteamVR to try to resolve the problem Unreal crashes. This has completely blocked the VR game I’m developing obviously, as I cannot get 4.13 to work with VR at all.

Any suggestions welcome

Edit: A few times it’s caused a complete lock up of my whole PC and can only be resolved by hard resetting my computer :frowning:

Hello Alt101,

I was unable to reproduce this issue on our end. I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?
  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?
  3. Could you provide screen shots of any settings you may be using that could be involved with this issue?

Here are the steps that reproduce the issue for me:

  1. Launch SteamVR, ensure everything is connected / working
  2. Launch 4.13
  3. Create new project with the VR Template
  4. Switch to the “MotionController Map”
  5. Start VR Preview
  6. Put on headset
  7. At this point, its a 50/50 chance if the screen on the Vive is frozen or not. Sometimes it is for me, sometimes I’m able to play the demo scene and interact with the blue cubes with my controllers.
  8. Close VR Preview
  9. This is the other point where the screen on the Vive freezes and the SteamVR status window displays “(unresponsive)”
  10. When I close SteamVR, my PC either hard locks up and I need to press and hold the power button to shut it down or Unreal crashes without error popups.

I’m not using any special settings, just trying to get it working with the unchanged VR Template provided. Other VR games are not causing this issue, it just seems to be with Unreal. It’s hard to provide a screenshot, as there isn’t any errors or anything displayed, the system just locked up / the Vive display freezes.

PC Specs:

  • Windows 10 Home 64-bit / Version 1607 / OS Build 14393.187
  • Intel Core i7-6700k
  • 16GB DDR4
  • GTX 970
  • SSD

Update -
Just gave it a try with my CV1 + gamepad (unfortunately I don’t have a Touch kit yet) and everything works fine. The issue only seems to be happening when I use the HTC Vive.

Hello Alt101,

I was unable to reproduce this issue on our end. I do have a couple more questions. If you leave the headset within the bounds of the lighthouses while exiting VR preview, does this issue still occur? Does this issue happen if you use the blank template rather than the VR Template?

Hello Alt101,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.

Thanks,

Thanks Rudy,

You can close the issue if you like. The issue is still occurring when I leave the headset within the lighthouse bounds while exiting VR preview. This issue still occurs if I use a blank template. I’m not sure what more information I can provide as I’m not getting any crash reports / logs as the problem causes a full system lockup that can only be resolved by hard resetting the PC. Is there a log file written anywhere that might contain more crash information that I could look up?

Perhaps it’s a problem somewhere on my end. I’ll be updating my video card to a GTX 1070 and will also be doing full reformat. If the issue persists past that I’ll follow up. Thanks for try to help.

Hello Alt101,

To answer your question about logs. You can find your logs by going to C:\Users\YourUserName\Documents\Unreal Projects\YourProjectName\Saved\Logs. Also, if you could post the results of your further testing when you finished that information may be helpful.

With the latest SteamVR update, the issue is no longer occurring. Must have been a problem with SteamVR in the end. Thanks for all your help trying to sort it out

I have had this issue since 4.15 and still have it on 4.16. It will happen on all projects, but quicker on heavier projects.
It does not happen if I disconnect the power for the Vive headset.