Quest Pro Eye Tracking Stopped Working after Meta Quest Link app version 76.0.0.452.315

[Ratfink]

Hi All

First time flying with QPro in a few weeks and noticed quad view eye tracking not working.

Long story short, it seems Meta is the issue with a new update that breaks eye tracking using Link (USB in my case)

https://communityforums.atmeta.com/t5/Get-Help/Latest-Meta-Update-Breaks-eye-tracking-and-avatars-for-QUEST-PRO/m-p/1311837#M363318

Rolling back to V74 could be a slolution according to the link above, but I'm happy to sit tight for a fix

Anyone else having this issue?

[mbucchia]

I've heard it from quite a few people yes.

[Tensorial_Architect]

No, Zuckweasel decided it is a "new" feature. 

I don't have this problem myself but am attempting to reproduce. If I can, I will submit a fix to Meta here shortly. Give me a few days ....

Edited April 17 by Tensorial_Architect

[Sprite001]

Had this problem with Quest Pro, v76. Eyetracking not working in DCS. I did a repair/reinstall of Meta Quest Link that seems to have fixed the problem for now.

[Qcumber]

7 hours ago, Ratfink said:

Hi All

First time flying with QPro in a few weeks and noticed quad view eye tracking not working.

Long story short, it seems Meta is the issue with a new update that breaks eye tracking using Link (USB in my case)

https://communityforums.atmeta.com/t5/Get-Help/Latest-Meta-Update-Breaks-eye-tracking-and-avatars-for-QUEST-PRO/m-p/1311837#M363318

Rolling back to V74 could be a slolution according to the link above, but I'm happy to sit tight for a fix

Anyone else having this issue?

Thanks for the heads up. I'll avoid upgrading. 

[Ratfink]

Rolling Quest Link back to V74 as per the link I included restores eye tracking

I've turned off auto updates, and will stick to V74 until forced to upgrade

[Tensorial_Architect]

I was finally able to reproduce the problem. I submitted a fix to Meta on Wednesday night and they released an update earlier today (April 19th). This bug has now been fixed I believe. Check it and see.

[Qcumber]

6 minutes ago, Tensorial_Architect said:

I was finally able to reproduce the problem. I submitted a fix to Meta on Wednesday night and they released an update earlier today (April 19th). This bug has now been fixed I believe. Check it and see.

Is this the PTC version? I have been avoiding using PTC but might give it a go if it's working OK with the QP. 

[Tensorial_Architect]

Nope, this is a regular update. Give it a shot Qcumber, ... don't like it, simply roll back. I fixed deir  s h i t z before, ... I'm a known variable you might say.

Edited April 20 by Tensorial_Architect

[Ratfink]

I upgraded the Qpro firmware to the latest V76 using the advice in this video and eye tracking restored - 

 

On 4/20/2025 at 9:15 AM, Tensorial_Architect said:

I was finally able to reproduce the problem. I submitted a fix to Meta on Wednesday night and they released an update earlier today (April 19th). This bug has now been fixed I believe. Check it and see.

Thanks for sorting that, I don't see the newer version available but using adb sideload to force V76 into the headset has fixed it for now

[Ratfink]

On 4/20/2025 at 9:27 AM, Tensorial_Architect said:

Nope, this is a regular update. Give it a shot Qcumber, ... don't like it, simply roll back. I fixed deir  s h i t z before, ... I'm a known variable you might say.

I couldn't figure out how to stop it upgrading back to V76 after rolling back to V74 - do you know if there's a way to force it to stay at a certain version?

[Tensorial_Architect]

Yes, there is a way. Open your Meta Quest Link desktop software -> go to Settings (on the left side) -> go to the General tab (on the top) -> find the setting entitled "Automatic App Updates" and make sure it is turned off. Then your Version will remain rolled back.

[skywalker22]

Yesterday I tried to fly DCS in VR after some time off (on v74), and I couldn't start the Quest Link, it was not connected. I tried all kind of things to make it work, but unsuccessfully.

I was focrce to install the latest v76 for Quest Link to work again!!! And now eye tracking in not working.

[diamond26]

 Similarly my quest link crashed out of the blue and then after reinstalling I got v76 and eye tracking stopped working Luckily I have VD installed. Headset is still on v69 (switched off updates)

Edited April 27 by diamond26

[Tensorial_Architect]

One thing to watch out for always if your eye-tracking goes down is the stupid Meta Horizon phone app. Don't ask me why, ... but when the Meta developers were creating the software environment for the Quest Pro, ... it is almost as if by design that they wished to make it as complex as possible, ... there are three places where settings must be adjusted, ... the Meta Horizon phone link, the Meta Quest Link desktop app, and the in-game "Cliff House." All three MUST be set correctly or you will lose eye-tracking.

Every time that Meta updates their Meta Quest Link desktop app, ... you will need to go back to the silly Meta Horizon app on your phone and re-enable the developer option under "Devices" and turn on eye-tracking there as well. Occasionally, this step is not needed, ... but often, ... it is. This may be the source of your eye-tracking problems for some of you.

[skywalker22]

48 minutes ago, Tensorial_Architect said:

One thing to watch out for always if your eye-tracking goes down is the stupid Meta Horizon phone app. Don't ask me why, ... but when the Meta developers were creating the software environment for the Quest Pro, ... it is almost as if by design that they wished to make it as complex as possible, ... there are three places where settings must be adjusted, ... the Meta Horizon phone link, the Meta Quest Link desktop app, and the in-game "Cliff House." All three MUST be set correctly or you will lose eye-tracking.

Every time that Meta updates their Meta Quest Link desktop app, ... you will need to go back to the silly Meta Horizon app on your phone and re-enable the developer option under "Devices" and turn on eye-tracking there as well. Occasionally, this step is not needed, ... but often, ... it is. This may be the source of your eye-tracking problems for some of you.

Good point!

But I can't connect headset to my android phone via bluetooth. It pairs, but it instantly disconnects as well. Any ideas how to overcome that?

[Tensorial_Architect]

Uhh, ... Google search.

(All right, ... just sh#$@ing you man. It is likely that you need to reboot your Quest Pro. Also, close the Meta Horizon app and then restart it. I've had this happen to me before. If the problem persists, check your NFC settings on your phone (NFC = near field communication).)

[Picchio]

Eye tracking isn't working in DCS/Quad Views, but it is enabled and working in the headset. Mobile and Link apps are set correctly (same as before), Dev mode enabled, Eye tracking over Link enabled.

QV log reports this error:

No data received from the eye tracker in 60 seconds! Image quality may be degraded.

This was discussed in Meta forums: https://communityforums.atmeta.com/t5/Get-Help/Meta-Quest-Link-app-version-76-0-0-452-315-has-stopped-eye/td-p/1313274

Still no solution, apparently.

Edited April 28 by Picchio

[Tensorial_Architect]

That likely means you don't have your Open XR layers stacked correctly. Look up a tool called OpenXR-API-Layers-GUI and read about how to use it and then move Quad Views up or down as needed. DCS can't see Quad Views if you've got other Open XR layers blocking it.

[Picchio]

33 minutes ago, Tensorial_Architect said:

That likely means you don't have your Open XR layers stacked correctly. Look up a tool called OpenXR-API-Layers-GUI and read about how to use it and then move Quad Views up or down as needed. DCS can't see Quad Views if you've got other Open XR layers blocking it.

Definitely something users expect to have to do...

Thanks for the tip, I'll give it a go if I have time.

[Picchio]

Uhm, nothing out of the ordinary.

Just to be clear, DCS can see Quad Views and it is correctly logged and I can see and modify the foveated region etc., it is the Eye Tracking feature that isn't working.

Edited April 28 by Picchio

[diamond26]

It's definitely an issue with META PC software as everything is enabled as before, Layers are correct but eye tracking is not working anymore with META Link in DCS. With exact same configuration in terms of layers in DCS, eye tracking works as always in VD.

[markturner1960]

15 hours ago, Tensorial_Architect said:

One thing to watch out for always if your eye-tracking goes down is the stupid Meta Horizon phone app. Don't ask me why, ... but when the Meta developers were creating the software environment for the Quest Pro, ... it is almost as if by design that they wished to make it as complex as possible, ... there are three places where settings must be adjusted, ... the Meta Horizon phone link, the Meta Quest Link desktop app, and the in-game "Cliff House." All three MUST be set correctly or you will lose eye-tracking.

Every time that Meta updates their Meta Quest Link desktop app, ... you will need to go back to the silly Meta Horizon app on your phone and re-enable the developer option under "Devices" and turn on eye-tracking there as well. Occasionally, this step is not needed, ... but often, ... it is. This may be the source of your eye-tracking problems for some of you.

So, out of interest I looked at this as I have a sneaky feeling my quad views is not working either after the update. I have literally NEVER looked at the meta app on my phone....so I just did, in devices I have the option to pair my headset, it does something then says look in my headset foir a code, nothing shows up there. Both devices are on the same network and bluetooth turned on.....so I am stuck here. I still have quad views and eye tracking enabled in DCS and the meta settings on my PC

[Tensorial_Architect]

Check your Bluetooth and NFC settings on your phone and Quest Pro. Then try repairing.

As I said, ... they tried, ... really hard, ... to make it absolutely as difficult as possible.

[skywalker22]

I tried everytihng, also with another phone, but nothing seems to work to connect headset to the phone via bluetooth. 

It pairs, also connects for a few seconds, but then it disconnects and stays disconnected!