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BackWithPipes

Vive Pro + Wireless jitter stutter every 3 seconds

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I have recently bought a HTV vive pro eye and a HTC wireless adapter.

When I use the Pro eye wired there is no problem and every thing runs smooth en ok. No jitters or stuttering.
When I connect through the wireless adapter the image is jitters exactly every 3 seconds. When I open settings in SteamVR open the frametiming window. I can see that there are spikes in the graph every 3 seconds exact the moment the screen is for a fraction a little bit blurry. When I move the headset, you can see that the tracking and image is distorted.
 

In the print screen 1 you can see the spikes in the selected lines.

I have swapped the GPU card and wireless adapter in every PCIe slot I have. No change.
Updated the BIOS to the official latest release and now running Betá 1A4 (released in 2018)
Have clean installed windows 10 home
Updated all MSI drivers through the MSI live update. Installed only drivers and not the utility that comes with the hardware.
Running the PC at stock BIOS settings and with overclock setting.

I have tried much more little stuff of what I know maybe could be the problem, but there is no change in the outcome. Always a stutter every 3 seconds.

CPU runs around 75% and the GPU around 50% constant. No pikes

My hardware:
Powersupply Corsair RM850 (850watt)
MSI Z87-G45 Gaming MS7821 (Bios at betá V1.10B4)
Intel I7 4770K running at 5,5GHz with non stock coller (temp when playing around 70C)
Kingston 16Gb ram DDR3 at 1333MHz (2 banks of 8Gb)
MSI GeForce RTX 2070 (with only drivers installed)

What could be the source of the 3 second stutter? How you could help.

Mark

1.png

Edited by BackWithPipes
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2 hours ago, Jakey said:

The above threat suggest the flowing:

Replace the short cable between the transceiver and the goggles with the long one.
Tried that. But the voltage drop is to much for the goggles to work properly. So that don't work. I have the pro, so there is only one cable from the transceiver to the goggles.

Change/Replace battery.
I running the transceiver of 2 different power banks and also a power brink capable for USB type C. No change.

Change the mode.
I have tried all three of the modes/channels. No change.

Place and angle of the antenna.
With a distance of 30cm of 5 meter gives me no other result.

Close doors en windows, and don't let the signal "escape".
I hope that this is not a serious answer.... Radio waves are traveling in a strait line. Thee can bounce of wall and metal object. But mostly it will dampening in the wall.
I have tried repositioning the antenna, change outlet socket, checked my eart-ground contact to the computer to make sure there is a ground connected to the computer.

I have no disconnection. I can play games en use the VR goggles, only the reaction and the image is disturb every 3 seconds.
 

Mark

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@BackWithPipes

In task manager locate "vrcompositor" and "vrserver" processes, right click-->"set priority" --> set to high and see if you experience reduced symptoms.  

 

Thanks!

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@jagibson
There is no noticeable different when I set the process "vrcompsotor.exe" and "vrserver.exe" on high. Did also tried it on setting low. Then I can see that moving the goggles is sometimes more jumping but the 3 seconds jitter is still the same.

Mark

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@BackWithPipes

Thanks for the additional feedback.  The 3 second interval for the interruption has me a bit stumped.  I have asked for some feedback internally here.  I will share any suggestions that come up here in the next day or two.

Thanks,

John

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I am having this EXACT issue. Every three seconds the screen pulses. Many times the whole screen goes pixilated for about 5 seconds and it drives me insane. Why is this product so difficult to get working correctly? I have been working on this issue on and off for months. Getting the 2080 helped slightly but the issues still remain. The tracking is perfectly fine but the pixilation and stuttering is unacceptable. 

AMD FX-8350
RTX 2080 Black 
32GB DDR3

@jagibson @Synthesis

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On 8/20/2019 at 5:47 AM, jagibson said:

@BackWithPipes

Thanks for the additional feedback.  The 3 second interval for the interruption has me a bit stumped.  I have asked for some feedback internally here.  I will share any suggestions that come up here in the next day or two.

Thanks,

John

@jagibson
Thanks John for the help.

I have already tried a different wireless adapter, but the result is the same. The store where I bought it suggest this option before completely return the product. I have 30 days to return the product for a cash-back. I have told the sales person That I'm opened a threat here for this problem. Sales person is also a VR user. Only he is using a wire.

I only have to correct the time between the spicks. Instead of 3 seconds (what I taught it was) it is a little bit more the 2 seconds.2.thumb.png.c8e46469b6c807ad8a6d466d477b544f.png

The chart shows a spike a little bit after 13260 frames and the next one is a little later than 13440 frames.
So 13440 - 13260 = 180 frames. And because the vive pro runs at 90 frames it is 2 seconds apart. Just my felling is that the time/frames between the two spikes is exactly 180 frames. But because de spike is coffers some time and there for some frames this frames we seen as jitter or stutter.

I'm getting the felling that the AMD Geforce RXT graphics card is the trouble maker, or a driver issue . I have read on treads that discus the ocules with "compositor render start" spikes. That sometime changing the main monitor output using on the graphics card (I'm currently using the HDMI output) would give the result of no spikes. My card only has 1 HDMI output and 3 Display port output. And don't have jet a display port to HDMI cable at home. Will get this tomorrow to test if that shows some change.
Also install old drivers could fix the problem. But for the RTX2070 are not the many "old" drivers.

What other card is a good option for use with VR in combination with the wireless adapter? Another brand gpu type?

I was looking with the windows process monitor to see if there is any process that takes a lot of cpu/gpu time. What I noticed is that dwm.exe (Desktop Windows Manager) is taking some GPU time frequently. This process is one of windows 10 bottleneck.  I have already every fancy windows 10 desktop setting set to low of off.
This websites has a nice explanation:
https://appuals.com/fix-desktop-window-manager-high-cpu-usage-dwm-exe/
but no change in the effect.

Edited by BackWithPipes

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Hello all,

I have now a working wireless setup.
What I have don is first I have changed the GPU with a diferent chipset. I replaced the RTX2070 with a radeon RX580. Also this gave me the same results. Smooth with wire and every 2 seconds a stutter with wireless. There was now only 3 things left that could cause this behavior:
CPU
RAM
Motherboard

Because it is a some what older model the CPU socket (1150) is not used anymore on today's CPU's. So replacing only the CPU could be difficult. That same is for the motherboard as well. Finding a different one with also good specification could be long and hard. And for the RAM I don't even start to look them up for replacing.

Because I also a busy guy, and want to get playing instead of replacing every part of my computer to find out what the problem is. I have bought a brand new PC.1350657603_1882311787_pcs-msi-a-8sd-497eu-infinite-a-8sd-497eu.thumb.jpg.4ba48e5c1b677d40d3ca9144b3c9a6e0.jpg

It is a MSI Infinite A 8SD-498EU
It has a Intel I7 8700 3,2Ghz - 4,5Ghz with 6 cores
16 GB DDR4 ram
And the MSI RXT 2070 GPU

And after setting up the PC and windows 10. I installed first the wired part en checked if that is working. And it was. After that, I installed the WigiG adapter in de PC and installed the vive wireless software. And and without much trouble it was working perfect. It is it same as with wire.

So conclusion: the Wireless adapter is a little bit picky I think with use on some older boards. But what I think is that the problem is a software/BIOS issue rater then hardware.
 

Edited by BackWithPipes
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