4.8 Oculus dk2 fps leak

Development Platform & Builds XR Development
1

Hi there.

I update the engine to 4.8 ( VR improvements ) but i only get a leak of FPS.

I ussually with my PC = i7,980GTX etc…] got stable 75fps with OculusDK2 , but in the update i usually dropdown FPS to 37,5fps and in this FPS can’t get a good demo. And, when i tryes to play 2 o 3 times to develop, the Oculus stop working and i need to restart the project v_V!!!

Any of u have the same problem?

2

I don’t have the FPS issue (in fact, with console command QAHEAD ON I get a big performance gain), but the DK2 does stop working correctly after a while.
It was recommended that we should roll back our nVidia drivers to 350.12, because the latest nVidia drivers are unstable with runtime 0.6.0.1, see

https://forums.oculus.com/viewtopic.php?f=26&t=24613

I think I might do this tonight.

My Specs:

i7 4790k devil’s canyon @ 4GHz
32 Gb RAM @2400
nVidia GeForce GTX 980
ASUS ROG Maximus VI motherboard

3

I did the roll back and looks normal now,

And 1 n00b question, how do u activate the Qahead on ? it’s not activated by default on the Runtime for WindowS?

4

It is done in UE4.

In UE4 whilst running your project, open the console (the ~ key), and type:

QAHEAD ON

then press enter.

You can also do this in Blueprint (in your gamemode blueprint, level blueprint etc.) by creating the node “exec console command” and setting the node value to QAHEAD ON.

5

Small correction: The command is ‘HMD qahead on’.

6

Thanks for that, !