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(Not Resolved) Known Issue - Quest PCVR streaming micro lags and stutter esp. when moving head

acreed11
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Hi team,

I'm getting micro lags and stutter in Airlink on my Quest 3 (EU/UK), esp. when moving my head. In the Oculus debug overlay this causes brief spikes in transmit/decode, fps drops and visible stuttering. The issue is not present on my Quest Pro with otherwise identical settings - see below screenshots to illustrate.

Few more details:
- Issue is not present on Quest Pro with same settings on HMD, router and PC (using same res)
- Issue is worse at higher bitrates, esp. >200mbps, but still present <200mbps
- Issue is unrelated to PC/game latencies (CPU, GPU, Queue each <5ms)
- Stutters/lags are intermittent (every 10-20 seconds) when not moving but happen immediately and reproducibly when moving the head to either side or especially looking downwards (i.e. on any bigger headset movements)
- Wifi 6E router (TP Link AXE75 EU/UK)
- EDIT: exact same issue with Asus RT-AXE7800 (EU/UK) wifi 6e router
- Connection shows as 2,400mbps
- Airlink codec H264 (but same on other codecs)
- I've attempted factory resetting, installing latest drivers
- Updated to v62 and latest Quest Link desktop version (I can see the 120hz option for my Q3)
- EDIT: Ordered a separate Quest 3 for testing: presents the exact same issue

-EDIT: Same issue on 5ghz 802.11ax 160mhz BUT switching to 802.11ac (!) completely fixed the issue. I cant test this on 6ghz but looks like 802.11ax or something related to how q3 implements it is the culprit

As the issue is worse the higher the bitrate and not present on Q Pro with otherwise same settings, I suspect it's related to the below known Wifi issues - but opening a new thread as instructed. 
https://communityforums.atmeta.com/t5/Get-Help/Known-Isssue-Unstable-wifi-coverage-with-Quest-3-on-s...

Best,
JensQ3Q3QProQPro

Updates:
- Tried separate router: exact same issue with Asus RT-AXE7800 wifi 6e router
- Ordered a separate Quest 3: exact same issue on both routers

-Same issue on 5ghz 802.11ax 160mhz BUT switching to 802.11ac (!) completely fixed the issue. I cant test this on 6ghz but looks like 802.11ax or something related to how q3 implements it is the culprit

263 REPLIES 263

acreed11
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@TheAntiSocializer just one further thought here as I don't see this in your fact finding list above - where I've read others mention this issue on reddit, discord and elsewhere, notably a lot of them were outside the US and esp. in the EU where wifi regs are different (and therefore i expect the q3 wifi implementation). 

Eng team might need to test this on a EU (/non US) HMD & router to be able to reproduce.

Feel free to suggest me other testing options if you have any thoughts on this issue.

Galatoni
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@TheAntiSocializer where are we with this? I've not had my quest 3 that long, and I'm yet to actually play any of my vr collection through my pc - the main reason I bought it.

Where would I stand with returning this under warranty? For me, it's a rather expensive and awkward paperweight. To make matters worse, I bought the elite head strap too!

Hey @Galatoni. As for our team investigating, I still don't have any updates that I'm able to provide at the moment. I've been passing along the information that's been provided but at the moment I'm still waiting to hear back. As soon as I do, I'll reach out here so stay tuned!

As for the warranty, I'd have to say that depends when you bought it and where from. You might want to check with the seller for that. If it was the support team, they can probably let you know through a PM to @MetaQuestSupport

Sometimes it's okay to be a little Bing Chilling

Surely, if a product is being sold to consumers and marketed as having a particular function (wireless PCVR via Airlink), if that function doesn't work properly, the item is not considered 'fit for purpose' and under consumer law can be returned for a refund. Here in the UK, I believe the Consumer Rights Act of 2015 covers this; maybe there is something similar in your locality? 

I'm sorry to disagree, but Airlink is bad and VD and Steam Apps are good.

Videos here:

https://drive.google.com/drive/folders/13hzcd83aly2e7e7hYxXsL4IDgjJXh1Tq

Maybe you should have provided access to the video first?

mikeljason_0-1709239293049.png

Gotta love the cloud.

I discovered something interesting that may be related to the problem. I recorded a gameplay video of the Asgard's Wrath on my computer (not on the headset) and you can clearly see there lags of hands controllers, so maybe the problem is not with the video stream, it is with sending controllers tracking data back to PC.
https://www.youtube.com/watch?v=Zf98q3NCk0Q 

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