Constant Perform. Spikes "VR.WaitForGPU" & "Unaccounted time between: camera.render and GUI.repaint"

I keep getting spikes periodically when using the Steam VR plugin. It's around every 2 seconds or so. It started randomly, pretty much after I updated to Unity 5.5 but I checked in 5.4 and now I'm getting the same issue... I also tried the latest patch of 5.5. I'm even getting this issue with a scene that has nothing except the "[CameraRig]" prefab from SteamVR.

I checked if it was a HTC Vive issue but I played a game and it didn't have that lag every 2 seconds.

Here is the profiler of the empty scene.


I'm getting both spikes from VR.WaitForGPU or Unaccounted time between: camera.render and GUI.repaint
Something that I saw as well is that in the Memory section of the profiler the MeshMemory gets some spikes at the same time.

I tried turning off the VSync (didn't do anything)

I already created a bug report (Case 860579)

Anyone have any solutions before I get completely dizzy?

 

Found the answer, it was all caused by a program I have called f.lux...
for some reason it just makes this spikes when it's turned on and when turned off it works like a charm.

Hope this helps someone

 

Definitely helped me! Thanks a bunch! (Sorry to necro this, but this has been bugging me for months)

 

Months later and the problem persists. Turning off f.lux stopped the performance spikes for me as well.
You still deserve a big THANK YOU @Rodiaz89 !

 

Perfect fix. Thank you so much for posting it

 

This could be related to the anit malware problem I found out about the hardway.

https://forum.unity.com/threads/per...e-and-vr-regular-vr-waitforgpu-spikes.521849/

 

what‘s mean called "f.lux"?can you explain this detailedly?

 

How to turning off f.lux? what's mean f.lux?

 

f.lux is a different program that I had installed in my computer, nothing to do with Unity but it was giving me the performance spikes. So I closed the program and I stopped getting the spikes.