10FPS in VR

[Stellatny45]

Recently started flying DCS again after several months off. To my dismay I am locked at 10FPS in VR in maybe 7 ouf 8 starts. Occasionally there is a normal start during which fps is in 80-90+ range. I've never experienced any similar problem in the past. This is using latest Varjo update, Nvidia drivers and QVDFR. Anyone else seeing similar issues?

Edited January 28, 2024 by Stellatny45

[Brainfreeze]

I have started to experience crap like this about couple weeks ago...   I am all good locked at 45fps then randomly frametime shoots up a I sink to 20fps for 5-10sec...
Tried everything so far... remove mods, check windows power setting, updated nvidia driver and reset its settings... nothing works and it seems to get worse rather than better.  

[edmuss]

Check to see if openvr is enabled or disabled in varjo base.  I think some hardware/steamvr configurations causes varjo performance to tank if openvr support is enabled.

Just untick the openvr box, leaving openxr enabled and see if it improves it

[Stellatny45]

What I've learned so far is that I can run DCS MT in the Aero as long as I do not invoke the Varjo foveated mod. Unfortunately that only gets ~60fps in free flight scenarios. If Varjo foveated is activated fps drops to 10. I have confirmed that Steam VR is using Varjo as the active XR runtime. Varjo foveated log reports:

2024-01-29 06:57:19 -0800: Using OpenXR system: AERO
2024-01-29 06:57:19 -0800: supportsFoveatedRendering = 1
2024-01-29 06:57:19 -0800: Trying to locate configuration file at 'C:\Users\Dad\AppData\Local\Varjo-Foveated\settings.cfg'...
2024-01-29 06:57:19 -0800:   Found option 'peripheral_multiplier=0.70'
2024-01-29 06:57:19 -0800:   Found option 'focus_multiplier=1.5'
2024-01-29 06:57:19 -0800:   Found option 'horizontal_focus_scale=1'
2024-01-29 06:57:19 -0800:   Found option 'vertical_focus_scale=1'
2024-01-29 06:57:19 -0800:   Found option 'turbo_mode=1'
2024-01-29 06:57:19 -0800:   Found option 'no_eye_tracking=0'
2024-01-29 06:57:19 -0800: Peripheral resolution: 1162x994 (multiplier: 0.700)
2024-01-29 06:57:19 -0800: Focus resolution 1614x1614 (multiplier: 1.500/1.500)
2024-01-29 06:57:19 -0800: Peripheral resolution: 1162x994 (multiplier: 0.700)
2024-01-29 06:57:19 -0800: Focus resolution 1614x1614 (multiplier: 1.500/1.500)
2024-01-29 06:57:24 -0800: Creating swapchain with resolution: 1396x1192
2024-01-29 06:57:24 -0800: Creating swapchain with resolution: 1396x1192
2024-01-29 06:57:24 -0800: Creating swapchain with resolution: 1614x1614
2024-01-29 06:57:24 -0800: Creating swapchain with resolution: 1614x1614
2024-01-29 06:57:27 -0800: Application is using Quad Views for this session.

Again, these problems are new to me after having been away from DCS for several months.

Edited January 29, 2024 by Stellatny45

[Stellatny45]

10 minutes ago, edmuss said:

Check to see if openvr is enabled or disabled in varjo base.  I think some hardware/steamvr configurations causes varjo performance to tank if openvr support is enabled.

Just untick the openvr box, leaving openxr enabled and see if it improves it

Will do & report back!

[Stellatny45]

37 minutes ago, edmuss said:

Check to see if openvr is enabled or disabled in varjo base.  I think some hardware/steamvr configurations causes varjo performance to tank if openvr support is enabled.

Just untick the openvr box, leaving openxr enabled and see if it improves it

Thanks. I did what you suggested and was able to get a solid 90fps on a default takeoff and circuit of Vaziani!

[edmuss]

Good stuff, always the simple things!
I don't know if the issue lies with valve or varjo, I think it's the former though with a steamvr update (possibly a beta?).  I've not had the problem and can run openvr and openxr via varjo base without issue; I'm on an older GPU though, perhaps it affects the 40xx?

[speed-of-heat]

im running a 4090 with VR and XR enabled it doesn't have an impact on performance either way (for me)

[Stellatny45]

I'm still running 3090 series and 5900x. I recall the Varjo foveated mod instructions suggesting to leave both modes enabled in Varjo base. I am using the Steam beta.

[Sile]

The bug is there since end of december after a SteamVR stable update. (Bug has been reported in the beta, but no one cared.)

It  affects DCS even if the Varjo OpenXR is used. (SteamVR components are used for tracking) -  It throttles DCS to 10 fps.

Only people with Steam DCS / or Steam MSFS are affected for some reason. I use DCS standalone and don't have the problem.
A friend experienced it when setting up his new aero. He switched to DCS standalone and had no issues any more.

A workaround is disabling OpenVR in Varjo Base. Another workaround is using an older SteamVR Version, e.g. the 1.27.5 beta.

I'm losing hope this will geht fixed: https://steamcommunity.com/app/250820/discussions/3/4036978698787139585/
It feels like the Aero is already dying.

Edited January 29, 2024 by Sile