Thank you Kevin for the update. We appreciate the time and support 
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Youāre amazing. I have a dongle coming this weekend, but Iād love to avoid using it. Thanks for listening to the community and working thru it. Iām very excited to begin using the 5k+ w. good controllers again.
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Just keep in mind itās an estimate and not a certainty. 
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Well iām already happy a potential fix is on the way.
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For sure - the first stuttering fix didnāt work for me, but they eventually nailed it. Iām fine with waiting - all I was hoping to see was an official response like that! Iām confident they will sort it out. Theyāre bundling index controllers, it would be huge to recall so many HMDs.
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That! would be awesome. I hope for the best. Thanks for answering to this post, i nearly lost my hope that we will sit on this problem without any solution except those workarounds.
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Great to hear a fix is coming! I will post mine here as I havenāt posted yet but I am having the same issues as everyone else. Really noticeable in fast games like Beat Saber.
Date: 20 May 2020
Issue Title: Tracking Issue with Index Controllers and Pimax headset
Description: Tracking loss with Index/Vive controllers on Pimax headset. I tested on Vive Pro/OG Vive and both the Index and Vive controllers have no tracking loss issues with those headsets.Big issue it causes a lot of games to be unplayable on Pimax headset.
HMD Model: 5K+
First 3 Numbers Serial: 203
Pitool Version: 258
HMD Firmware: 263
Tracking: 2 x HTC LH 1.0 / 3.5 Meters apart in diagonal 2.3 Meters high
Controllers: Valve Index and Vive wand
System Info
- Windows Version : Windows 10 Pro v1909 OS Build: 18363.836
- CPU: i7-9700K OC @ 5.1GHz - H150i Pro 360mm cooling
- RAM: 16GB DDR4 @ 3200Mhz
- Motherboard: Gigabyte Z390 Aorus Ultra
- GPU Model: EVGA 2080 Ti FTW3 Ultra
- GPU Driver: 445.87
- SteamVR Version 1.11.13
Ok so I just updated to PiTool 259 and it seems to have fixed the tracking issue. I havenāt done extensive testing but I tested in Beat Saber just now and did not have the issue. (edit: other users did testing of tracking issue, result: not fully resolved just less frequent)
I couldnāt find a thread for the PT 259 release yet so I will just post here.
Good:
-Fixed controller tracking issues (apparently not fully fixed just much less frequent)
-Fixed IPD issues in 144hz mode
Bad
-Headset display seems to be dull/dim compared to before. I tried upping the brightness to +5 but it didnāt help. (roll back to previous PiTool doesnāt help still dim)
@Heliosurge any release notes for the new PiTool?
Edit: at this time I do not recommend update to PT:259/FW:264 due to dim display issue despite slightly better tracking.
Edit again: I am staying on 259/264 now as the tracking is definitely much better than before and also I got the backlight issue fixed using KingToddās fix here:
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9 posts were split to a new topic: PiTool 1.0.1.259 discussion
Moved discussion about new PiTool version to new topicā¦ 
Left single post by @Eyeon.
Not sure which thread to respond to.
I have tracking issues about every 5 mins with the left vive wand on both my hmds 5k+ and 8k+. I also have the tracking issue on my Left index controller. This must be software being on so many devices. And the fact that itās the left vive wand as that can be either controller on start up.
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Date: July 6st, 2020
Issue Title: Tracking Issue with Index Controllers and Pimax headset
Description: Tracking issues in all games with Pimax HMD, no problems with my index.
HMD Model: 5k XR
First 3 Numbers Serial: 201
Pitool Version: 1.0.1.261
HMD Firmware: newest
Tracking: 2x LH 1.0 / 12 feet appart in diagonal / 7 Feet High
System Info
- Windows Version : Windows 10
- CPU: 9900k
- RAM: 32GB DDR4 3200
- Motherboard: GIGABYTE Z390 Aorus Master Mainboard
- GPU Model: GIGABYTE GeForce RTXā¢ 2080 Ti Aorus 11GB
- GPU Driver: newest and older
- SteamVR Version: newest and older
Attachments (Pics/Video etcā¦)
during the valve and pimax support tickets I went through all possible troubleshooting, like unplugging all not needed usb devices, sending steamvr report, Windows diagnostic report, trying all pitool versions, Uninstall USB devices in steamvr, complete win reinstall. Tried also original USB driver, all USB ports and newest Bios, tried different pcs, different rooms, changed ALL hardware, also the XR HMD and index controllers, see this https://community.openmr.ai/t/index-controller-use-with-pimax-discussion/19940/266?u=yxcxcv.
Only solutions: use cables for the controllers or flashed steam dongles.
Shame that this still seems to be an issue with .261.
I had the issue and downgraded the firmware to ,253 and no problems whatsoever.
can you downgrade to 253 and see if it works for you?
1 Like
Date: July 21st
Issue Title: tracking issue index controllers and pimax
Description: tracking going in and out with one controller if I connect that controller directly to the headset tracking is 100%. This issue must be a direct issue with the wireless dongle in the headset since when bypassed via USB c cable everything works great. Pimax gave crazy solution to buy a dongle to fix this after I just paid 1000 dollars for this headset and have only had it for like 2 months.
HMD Model:5k xr
First 3 Numbers Serial:201
Pitool Version:261
HMD Firmware:latest
Tracking: LH 1.0
System Info
Windows Version : 10
CPU: i7 7820hk
RAM: 16gb
Motherboard:
GPU Model: gtx 1080
GPU Driver: 446.14
SteamVR Version: latest
Oculus Version: latedt
1 Like
If this is due to the steam dongles then pimax should have valve replace the dongles that are not working a quick check for these discontinued dongles are going for like 50 to 80 bucks for one when brand new they were 13 bucks.
Issue is that the receivers in the HMD arenāt USB dongles, but tiny surface mount radio chips. Disassembly and replacing that IC would be a net loss for Pimax (even with a 1,000 dollar hmd) so I donāt expect them to do that.
We still havenāt received a clear answer in confidence from Pimax on whether or not a software/firmware fix is possible. Being honest, your best bet is to buy a dongle. Is it ridiculous? Yes, I donāt plan on ever purchasing from Pimax again, the fact that they continue to sell index controllers borderlines illegality imo.
https://tundra-labs.com/shop/vive-dongle this is the cheapest option currently, and it looks way better than what I bought.
Well, apparently Pimax doesnāt want to assume this defect, there are some responses from the (helpful) support :
Hi XXXXX,
This problem is difficult to be solved by changing the software Settings. Our suggestion is to buy a Dongle (I have provided you with the picture) and install it on the helmet (I took the picture of the installation position for you). Its function is to enhance the signal, which may solve the problem of missing the handle
Pimax Service Team
Miracle
Then after I ask why I have to buy a dongle (which is not sold anymore in europe) for a defective unit :
Hi XXXX,
Itās hard for me to confirm this is a pimax defects, because there is this problem is very rare, I give you is also a kind of by other tools to solve this problem, and Iām sorry, our company didnāt also not produce dongle, this problem I also feedback to development department, they give me a reply is also difficult to work out the problem of the rare, Iām sorry.
Pimax Service Team
Miracle
Then after some insistance about the fact this is not rare, as seen in this forum, that I canāt buy a dongle, and strange that Pimax doesānt want to fix the issue :
Dear XXXX,
Firstly, we are sorry for the issue you have occurred. But I have checked your order and found it has passed the warranty period. We offer one year warranty. You received the item in March 2019, but you contacted us in June 2020. So I am really sorry we are unable to offer replacement. We really appreciate your understanding.
As our technical support told before, you can have a try to buy a Dongle and install it on the helmet . Its function is to enhance the signal, which may solve the problem of missing the handle. Thanks.
Best regards,
Pimax Service Team
Vivi
After that, there is nothing to add. Sadly. Even if in Europe the warranty have to be 2 years. 700ā¬ for a defective headset. I didnāt see the problem before receiving my controllers.
Sry guys.
Could you send us the link to the dongle they gave you?
Thanks for sharing by the way.
They didnāt provide a link to buy a dongle, just pictures of what your headset looks like with :
Regards,
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I got the same email messages with the pictures of how I can pay extra to fix the issue that they should be resolving. but I just purchased mine so it is still under warranty. the best fix for Pimax is to mass order the dongles from the link that the guy above my post listed or directly from valve at a discount then they can provide the dongles to the customers with this issue and the fix wont cost them that much per customer. I will say this Pimax customer service has gotten way better in the ātime to reply to a customerā catagory even though the replies are not making us happy.
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Yes they are definitely improving. Iām sad to see their official stance is that they wonāt be fixing this, but I bet itās an impossible fix without proper dongles. Itās an absolute deal breaker for me ever considering another headset, and at this point I agree with you that they need to be doing more to fix the issue, even if it means including a steamvr tracking dongle (P.S Pimax, Iād be happy to design a dongle pcb and programming jig for youā¦ you cannot keep relying on 3rd party solutions to YOUR problems. Dongle BOM is one active chip and ~10 passives, your engineers are certainly fully capable!)
Further, if I bought these controllers in a bundle with the HMD I would be demanding a refund, not an RMA. Itās defective out of the box and they are not fixing this problem. In fact, they removed the top USB-C port on the 8kxā¦