Vive Focus Vision Display Port Mode dropped frames / jitter on head rotation

[RobP]

Hi All,

The good news is that the headset is finally stable after updating all the software and drivers - though for wireless I can only use TCP mode, which is fine as that seems to work very well.

The only remaining issue is a Display Port issue. If I rotate my head, I get repeatable frame drops/judder every 10 degrees or so. It's only head rotations that seem to do this. I even get it in low performance environments like Steam VR home. It's most distracting from an otherwise very smooth and detailed experience.

I was wondering if anyone else is experiencing a similar issue?

I did read that an early reviewer had exactly the same issue and that HTC said it was down to an old batch of Display Port cables. Is that a thing? If so, is there a way of identifying my cable? I got my DP kit pretty early on Monday 21st of October, so maybe I have an old cable?

[C.T.]

9 hours ago, RobP said:

Hi All,

The good news is that the headset is finally stable after updating all the software and drivers - though for wireless I can only use TCP mode, which is fine as that seems to work very well.

The only remaining issue is a Display Port issue. If I rotate my head, I get repeatable frame drops/judder every 10 degrees or so. It's only head rotations that seem to do this. I even get it in low performance environments like Steam VR home. It's most distracting from an otherwise very smooth and detailed experience.

I was wondering if anyone else is experiencing a similar issue?

I did read that an early reviewer had exactly the same issue and that HTC said it was down to an old batch of Display Port cables. Is that a thing? If so, is there a way of identifying my cable? I got my DP kit pretty early on Monday 21st of October, so maybe I have an old cable?

What GPU are you using? 

[RobP]

The GPU is a Gigabyte 4090 Aorus Master graphics card with 24Gb on board. It's running nVidia driver 566.03. The rest of the machine specs are an Intel I9-13900K @ 3Ghz with 64Gb RAM.

Performance between the framedrops/jitters is very good indeed, even with demanding titles like Microsoft Flight Sim, as long as I don't rotate my head.

The issue happens in all games and as noted above it also happens in Steam VR home which isn't too demanding.

The review I mentioned above is this one Vive Focus Vision Hands-On: Lossless PC VR Through Fresnel Lenses around 8 paragraphs down. It's the comment about the pre-release cable that I find interesting.

One thing I will try tonight is my Focus 3's streaming cable. It looks outwardly the same as the DP cable, so it would be interesting to see if there are any differences.

[C.T.]

Can you try DDU then downgrading to 560.94?

[RobP]

That was unexpected.... It was the cable!

I switched to 560.94 and things seemed a little better, but the judder was still there.

I then decided to get my Focus 3 out of storage and on an off chance, try its usb streaming cable. This worked no jitters!

I then went back to 566.03 with the Focus 3 cable and again everything worked great.

As a final step, I switched back to the Vision's cable and things went back to being jittery.

I didn't believe the results so switched both cables in and out a few times. Each time, the Focus 3 cable was perfect, but the Focus Vision cable showed frame drops.

I'm guessing I somehow got a pre-release cable?

[C.T.]

Focus 3 cable isn’t capable of doing DP streaming. Are you comparing under USB streaming?

[RobP]

You're right - I just did another test.

I had assumed that if the cable was plugged into the box it would always be DP streaming. But the icon is indeed Blue with the Focus 3 cable.

I guess the DP box falls back to USB streaming when the wrong cable is connected?

Darn, I guess, back to the original issue!

 

[C.T.]

14 hours ago, RobP said:

You're right - I just did another test.

I had assumed that if the cable was plugged into the box it would always be DP streaming. But the icon is indeed Blue with the Focus 3 cable.

I guess the DP box falls back to USB streaming when the wrong cable is connected?

Darn, I guess, back to the original issue!

 

let me get you a tool to update the convertor firmware.

[RobP]

Thanks CT - will let you know how I get on 🙂

[fIreChuckEr]

On 11/7/2024 at 6:41 AM, RobP said:

Hi All,

The good news is that the headset is finally stable after updating all the software and drivers - though for wireless I can only use TCP mode, which is fine as that seems to work very well.

The only remaining issue is a Display Port issue. If I rotate my head, I get repeatable frame drops/judder every 10 degrees or so. It's only head rotations that seem to do this. I even get it in low performance environments like Steam VR home. It's most distracting from an otherwise very smooth and detailed experience.

I was wondering if anyone else is experiencing a similar issue?

I did read that an early reviewer had exactly the same issue and that HTC said it was down to an old batch of Display Port cables. Is that a thing? If so, is there a way of identifying my cable? I got my DP kit pretty early on Monday 21st of October, so maybe I have an old cable?

Yes, same issue.  Thought it was just my setup for whatever reason. 

On 11/8/2024 at 12:24 PM, C.T. said:

let me get you a tool to update the convertor firmware.

Can I also get this firmware update?