Vive Focus 3 Hand tracking causes runaway network latency in statistics view, causing stream to lock up.

[imetandy]

Description

Hand tracking runaway network latency with Vive focus 3. Whenever hands can be seen by the Vive focus 3, the network value in statistics rises until everything crawls to a halt. If I hide my hands and wait a while, it will eventually catch up and correct itself.

General Troubleshooting

• [ X] I carefully followed the instructions in the README and successfully completed the setup wizard
• [X ] I read the ALVR Wikis here and here

The issue is present in release v20.1.0 I tried the most recent nightly (20/07/2023) and experience the same issue. I tested with the exact same session.json file, and a Quest 2, the issue did not occur, so seems to be Vive Focus 3 only. This also happens with controllers.

I have tested over wifi 6E, and tested over 5Ghz, which both show same issue.

Environment

session.JSON file attached session.zip

Hardware

CPU: Intel i7-11700K GPU: NVIDIA RTX 3080Ti GPU Driver Version: 536.40 Audio: NA

Installation

ALVR Version: ALVR v20.1.0 ALVR v21.0.0-dev00+nightly.2023.07.19 ALVR Settings File:

SteamVR Version:

Install Type:

• [ X] Packaged (exe, deb, rpm, etc)
• [ ] Portable (zip)
• [ ] Source

OS Name and Version (winver on Windows or grep PRETTY_NAME /etc/os-release on most Linux distributions): Windows 10 Pro

[zmerp]

This bug happened before and I fixed it. But somehow it came back. I will investigate.

[imetandy]

A note to say that with hand tracking disabled, the issue does not occur. I was using controllers only and fairly normal operation (a bit stutter-y on controllers, but zero tweaking done for latency etc)

[zmerp]

Unfortunately I cannot reproduce this bug. I tested on a Focus 3 running the latest firmware (5.0.999.820).