Constant Stuttering Frequence since 30th of May update

[ejbhimself]

vor 19 Stunden schrieb BIGNEWY:

Good to hear you have improvement. We have not had any patch or made any changes. 

So what did you change? 

 

from there's been no alterations of anything from yester-yesterday to yesterday and from yesterday to today, since the computer in question is exclusively used for dcs, but the problem returned today. it's definitely not been some sort of hallucination on my side, since i've been able to start, run and land the both f4s smootly yesterday, but today it's the same thing all over again. 

[BIGNEWY]

2 hours ago, ejbhimself said:

from there's been no alterations of anything from yester-yesterday to yesterday and from yesterday to today, since the computer in question is exclusively used for dcs, but the problem returned today. it's definitely not been some sort of hallucination on my side, since i've been able to start, run and land the both f4s smootly yesterday, but today it's the same thing all over again. 

Could it be a windows thing, or possibly a hardware temperature thing?

[ejbhimself]

vor 31 Minuten schrieb BIGNEWY:

Could it be a windows thing, or possibly a hardware temperature thing?

that's hard to say, since it came up right with the update in question, stopped only yesterday. how the update might impact windows routines, or the other way around, is a question only the coders can answer, i guess.

[aracas11]

Hi All

I`m having the same issue.

I have a Quest 3 at 72 Hz and the frame rate keeps hunting around from 67 to 75 fps.

As soon as the frame rate moves from 72 it stutters.

I have a 9800x3d , Palit RTX5090, 64 GB of RAM at 6200, and a Crucial T705 2T.

I have noticed that the Nvidia frame rate limiter isn`t working in DCS it did work previously.

If I set it to 72 and run the sim in 2D (1080p) I get around 270 fps over Cairo at a 100 feet and 300 fps in the menus.

If I then run Port Royal with the limiter on it`s locked at 72 fps.

When I turn off the Nvidia limiter and use the in sim one set to 75 in 2D I have 75 fps in the menus and missions.

With the in sim limiter set to 75 fps the frame rate in VR is still hunting around and I`m still getting stutters.

The 5090 is running at around 64c when in mission and the CPU is well within it`s operating range.

The CPU isn`t clocked the GPU is but I get the same result when it`s unclocked.

Thanks

 

Dave

[aracas11]

Oops

My mistake.

Nvidia profile inspector was loading the DCS profile on sim launch.

Out of the box this profile has frame limit off.

I have now set the frame limit to 72 in the Nvidia DCS profile.

Now when in the sim menus the fps is 72 I can`t do a test flight at the mo because

the quest is flat.

I will report back.

[Skydogs]

Hello everyone,

I wanted to chime in here because I've also been experiencing regular micro-stuttering in VR since the DCS update on May 30th – despite very powerful hardware:
My system:
Windows 11 Pro
AMD Ryzen 9 5900X (12 cores, 24 threads)
NVIDIA RTX 4090 (latest drivers)
64 GB RAM
MSI B550 Gaming Plus motherboard
Meta Quest 3 via Virtual Desktop (OpenXR Runtime: VirtualDesktopXR)
Symptoms:
In VR (OpenXR Toolkit active), stuttering occurs constantly every few seconds, regardless of GPU load.
FPS according to the overlay (72/80 Hz) are stable, but frame rates drop briefly periodically.
OpenXR Toolkit reports "CPU Bound (Main Thread)" even though CPU load in monitoring tools isn't at its limit.
This behavior only occurred after the update at the end of May. Up – performance was very good before.
Measures taken so far:
FPS limit set via graphics.lua (e.g., maxfps = 80) and NVIDIA driver
NVIDIA driver: "Low Latency = ON", "Maximum Pre-Rendered Frames = 2", V-Sync OFF
Hardware accelerated GPU scheduling: disabled
Gaming Mode: disabled
Core Isolation: disabled
RAM: DDR4-3200, EXPO enabled (BIOS)
Hot Plug in DCS: disabled
Mouse polling limited to 500 Hz
Shader cache cleared in Saved Games
Power profile: Ultimate Performance
Process Lasso tested (Affinity 0-11 set, CPU Priority: High)
Conclusion:
To me, it currently looks like a systemic change in main thread behavior since the May 30th update – the symptoms are independent of the runtime setup (Virtual Desktop or Link), GPU driver, or Windows Tweaks.

Is there already an official statement or planned fix from ED on this?

Best regards

[Raven (Elysian Angel)]

On 7/1/2025 at 10:10 AM, Skydogs said:

Is there already an official statement or planned fix from ED on this?

No, but whatever they did that caused the stuttering I showed in the screenshots I posted, is fixed again since 1-2 patches.

What I did notice however, is that I had to disable ReBAR after installing the latest nvidia drivers.

It is apparently not officially supported, but never gave me any issues either - up until now that is.

You might try that as well and see if it fixes it for you.