yashsingh1/xdaforums huggingface dataset:
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Thanks at all for the report, I will try to fix front camera in next build, with stock kernel sound work fine at all? And give option about the battery and charge!

If someone can send me a log of front camera FC can help me!
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Thanks a lot for your word, it's only the first build, I hope the dev of void kernel make it more compatible with my lineage, enjoy with 1080@60FPS
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] dumbl3:
Here is a log:

https://tinyurl.com/y7ttq9oj
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] GuestD0097:
An advice, you should check if audio works before publish a ROM.

If you are using z2-dev sources you should know that I'm still working on fix the audio. If not, please be kind and release your sources.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I have build with z2-dev sources, at moment, and know the problems of this rom, I can help to fix.

There are source more old, but have audio and front camera work good.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kagazushi:
I can confirm, with the stock kernel: no sound neither...
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] varotone:
If you have fixes for our sources, please contribute back to z2-dev via pull requests.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I not have fix it already, we can talk about it with pm?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] varotone:
Sure, PM away.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Waiting sound fix and I'll switch to this ROM from AEX.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] mike2587:
Hi [MENTION=6002018]Ninnix96[/MENTION]

Is the popping sound issue present on this rom?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
The problem are the ROM don't have any sounds at this moment :(
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] mike2587:
You have pm
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] cpurage:
[MENTION=6002018]Ninnix96[/MENTION] your ROM is the best LineageOS 14.1 so far, I vote to be uploads as official build and please take care of this baby, cause is the best Nougat 7.1.2 baby out there so far and NO need of overclock please, 135K on AnTuTu is VERY good result for a stock frequency of the SD820 ...

Изпратено от моят Z2 Pro с помощта на Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Thanks my friend, I hope to make it always better, and I want to keep it as '' untouched lineage os'' very very seems to official, first to make it official we must fix sounds and front camera.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kagazushi:
I noticed too that the notification led is only red, can you fix that thing too?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] dumbl3:
I noticed that sounds via my Bluetooth speaker is working just fine :confused:
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Yes we search to fix all, but there are more important problems at moment.

Have tried with headphones?

I must came back to RR for some day for work I need sound :(
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] dumbl3:
Nope, can't test no more.. Just moved back to AEX too, because I have same issue. Need sound for work and waking up ;)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kagazushi:
Yes off course, the sound is why I just went back to AEX. I was just doing bug reporting as i saw it.

You do a great job!
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] :
No one should use this ROM. At this point it is incomplete and not recommended for daily use.

Ninnix96 only compiled sources that did not seem to understand and requested donations for that... :(

I'm still waiting for a github fork and/or a pull request if you want to help, Ninnix96.

Fix for audio, the front camera and notification LED are coming, but not for this ROM. Our intention is to promote LineageOS for Z2 and Z2 Pro as an official ROM but it takes time and I do not like to publish something incomplete.

As always if you want to help any pull request is welcome.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I don't have requests nothing and have take any money, what's the problem of compile a ROM not stable? I have write pm to you for help to fix without answer of you. My only goal is a good ROM for this phone and make it avitable for all.

Do not post your code if then you are jealous that someone uses it or improves it ...

You did not understand anything I do not understand this tone with me.

It's a pity because I thought you were happy about a collaboration.

I not understand what is your problem...
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] :
As I said I don't like publish something that I know that doesn't work.

You should at least fork our sources and test your ROM before publish it.

I will upload the fixes when I test them. Not before.

Github is the way you can help us. Not PM.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Ok, I have already test it before... So I still do not understand your problem, I said I'm ready to help you if you want everyone to do it by the way

And learn to have a more friendly tone.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] :
So your change fix the audio?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
You not understand me, I don't have fix audio but I stay work for it. I have publish the ROM with this problem but I don't think I'll go to hell for that :D

It would be far simpler that instead of attacking we would cooperate
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] :
You waste people's time and next time anybody publish a LineageOS ROM, people will find it difficult to trust if it will work.

Also, please imagine building something and suddenly someone takes it in the middle of the process and announces it to the public... Not cool.

Fork our sources and make your own ROM if you want to do it. With your own signature and taking responsibility for it.

If you want cooperate GitHub is the way.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I did not violate anything and took no credit, you do not know what open source means and you will never improve this way, I appreciate your work but I'm sorry that speaking to you I'm losing all the estimation I had

Stop to go OT in this thread or I contact a moderator.

If have a problem write in pm
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] zyvex_14:
I really don't understand why you are getting so mad at this guy!

At least he is trying to do something.

Have you ever found a ROM with all problems fixed at once on the others ROMs availlables for the ZUK Z2 pro? I don't think so!

If you don't want to try this ROM, then just forget this thread and that's it!
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] varotone:
Okay, let me explain how it looks from our side:

We are working hard on our sources, but they aren't ready yet. Then someone comes, builds our sources without any changes and publishes the build as their own, all the while with a donation link in their signature.

We don't mind if you make a fork of our sources with custom stuff and publish that, but to literally just build and publish hurts us because:

* People will think we are involved in these builds, which we aren't

* People will associate our name with these incomplete builds and think it's our fault

* People may donate money to you thinking that theyre helping development, when they aren't because you are not contributing anything but build time. And no, PMing an untested change is not contributing. Contributing is done via github or similar means.

This is our view of the situation, so perhaps now you understand
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I have 1000 project open in xda, the signature is it about 4 years, I need to contact a moderator. Stop spam.

Read license and forum rules.

And if want my help let me to work.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Topogigi:
I totally agree with the post quoted above.

There is an evident reason why original developers did not publish an incomplete and malfunctioning rom. Anyone should respect the others hard work and whatever contribution should be offered without hitting the scene and pretend to be the original author of the whole work. Just my 2 cents.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I did not pretend anything. I simply left their repo, I did not know it was a crime.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] LBA97:
Totally agree with both.

OP, I said this was [MENTION=8479760]cosmedd[/MENTION] work, and you said it was YOUR work. I understand your good intentions, you tried to bring a more modern build than [MENTION=8479760]cosmedd[/MENTION]'s in zukfans.eu, but you can't pretend it's your whole work.

Also I don't share your open source's definition. It means that anybody can use it freely, but if you're posting another's work as yours you're lying, you should recognize them in your first post as it's theirs effort and not yours.

Please don't pretend you're a victim, you've done some mistakes and should be responsible for them.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I have said I have build it, not is my work, now I have my source with my work, I have write in first page of their. I have good intentions, Be made a dust for nothing.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] cpurage:
[MENTION=6002018]Ninnix96[/MENTION] what is happening bro, were able to figure out the sound issue or still work in progress? The void33 kernel (no matter that it is installed on the AEX and not on your ROM) fcuked up even the perfectly working 1080p@60FPS in your ROM, that's why I reverted back on void32 and the 1080p@60FPS is working in synch once again ...

Изпратено от моят Z2 Pro с помощта на Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
I'm working on the fix for the sound at moment, and I hope soon there will be news!
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] KennyG123:
Please note that XDA is a place for sharing and building on others work! This is how XDA became great!!!

As noted in Rule 12, only the original developer can request the take down of an unfinished work.

12. Sharing

XDA-Developers is based on the principle of sharing to transmit knowledge. This is the cornerstone of our site. Our members and developers freely share their experience, knowledge, and finished works with the rest of the community to promote growth within the developer community, and to encourage those still learning to become better. There are those, however, who take advantage of this model and try to make personal gains from the hard work of others.

In order to preserve the delicate balance between sharing for the good of the community and blatant self-promotion, regular members and developers alike must understand (and agree) to the following:

12-1. Give credits where due - Credits and acknowledgements for using and releasing work which is based on someone else's work are an absolute must. Works reported to have no credits will be taken down until proper acknowledgements are added by the member in question;

12-2. Courtesy - While most of the work released on our site falls under the umbrella of open source, that is not the only license model being used by developers on xda-developers. In order to prevent problems, we ask that if you decide to base your work on someone else's that you check the license model being used (as it might not be as permissive as one may think);

12-3. Re-releasing other's works as your own is forbidden. The code that you release into the wild must have something beyond minor aesthetic changes that makes it better than the last. As this can be subjective, kang reports will be reviewed on a case by case basis. If you feel that your code has been kanged, please contact the Dev Relations team (listed below) if you cannot solve the issue amicably via PM. Please understand that you will be asked to provide evidence to substantiate your claim;

12-4. Developers can issue take down requests (by contacting the Dev Relations team) under the following circumstances:

- in-process builds start showing up on forums when the developer is not yet ready to release the work;

- cases in which another developer is too aggressively soliciting donations or misrepresenting the work (kanging);

- unofficial builds where an official build is already available;

In summary, we want people to have access to work and knowledge alike. Sharing is good and courtesy and ethics go a long way.

Developers with questions, comments, complaints, or concerns about our rules (or anything!) should send a PM to our Dev Relations team (efrant or sykopompos) or to a Moderator. We are here to help!

Please keep this thread on topic until such a take down is given

Thank you for your cooperation

Friendly Neighborhood Moderator
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Thanks for your words :victory:
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] cpurage:
[MENTION=6002018]Ninnix96[/MENTION] sup bro ... any progress on this super clean build so far ???

Изпратено от моят Z2 Pro с помощта на Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Yes I stay work for new build with fix in next week
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] somayajisubs:
Waiting :):p
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Topogigi:
I guess audio will be fixed when [MENTION=8479760]cosmedd[/MENTION] or [MENTION=5719417]varotone[/MENTION] will find a solution.... ;)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] enyx.es:
Don't know why people are so mad whith OP. Haven't see any thread about any kind of development of Lineage here

Enviado desde mi Z2 Pro mediante Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Keep they to talk... I have problem in this day ago, but now the work on my lineage seems go in the right way! ;)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] stellair:
Can someone tell me how to put another rom like Mokee or AEX because this Lineage 14.1 which is installed on my phone is draining the battery after 1 day.

Thanks!
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
The same as you installed this one - full wipe and then install
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] stellair:
I received the phone with an install of Lineage on it so I don't know the steps and software I need :(
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Just go on YouTube and follow last steps, you should already have TWRP installed. New it's very easy to flash.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] gella1992:
I have installed this Rom. Great Battery-Life. Snappy and fast. Looking forward to next releases

Edith: Sorry Guys, wrong Thread. Used the one from cosmedd
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] stellair:
Thanks Bryan ;)

I went to youtube and I find a lot of tutorials for ZUK Z2 and ZUK Z2 Plus. Which is more compatible with my ZUK Z2 Pro device? For TWRP I saw that there's only for Z2 and Z2 Plus: https://twrp.me/zuk/zukz2.html
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
TWRP is already installed on your device. Search how to use it.

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] stellair:
What is the best custom rom actually? Without many bugs and good battery life? I saw AOSGP is one of the best out there
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Update
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Any changes? Or just updating from source?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
DUDE THE U-HEALTH SENSOR TURNED ON ITSELF JUST BY OPENING A SPECIFIC APP !

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Explain pls:angel:
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Download "CPU-Z", open it and touch the sensor

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
I haven't installed new build yet, but do you mean heart rate sensor?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Yes, when I touched it a big red led turned on in this sensor, and even if I approach my finger at 0.5 centimeter

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
But can you use it properly with uhealth app?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
No, there is nothing in the app to use the sensor

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
So it remains useless but it's finally working on custom rom and that's really big progress
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Yeah that's the most important (but I'm still on 15/10/2017 version), I have the proof that the sensor is connected

Envoyé de mon ZUK Z2121 en utilisant Tapatalk

---------- Post added at 02:10 AM ---------- Previous post was at 01:26 AM ----------

Humm... Wait, I'm on another LineageOS ROM^^

This ROM is full working ? Or still bugs like no sound etc ?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Which one? And which one are you using?)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
The one by "cosmed", witch is based on davidevinavil's sources

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Oh i know that, but in my case all his buils are very laggy on my device(
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
No chance, for me it's the fastest ROM for this phone, I tested everything and I'll stick with this until AEX 5.0 reach the beta status.

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
There are a lot of BUG fix, someone interested for next build a new toolchain, viper and other customization?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Yeah it would be cool !
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Yes, because LOS is pretty empty :)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Thanks tell me about customization to add(not rom feature, but apps as viper) and bugs of last built. I can also built a RR
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Oh a RR build would be amazing !!

The only one existing have too much chinese bull****.

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] satmaster:
+1 for RR
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
I don't want to ask too much but do you think it's possible to build a Paranoidandroid for Z2 Pro instead of RR ?

Sources here : https://github.com/AOSPA

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
RR is based on Los and I can use the same source, AOSPS request more work and I don't won't spend a lot of time on 7.0 rom, with the first oreo rom are coming
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Bryandu13:
Understood ! So waiting forward your RR build

Envoyé de mon ZUK Z2121 en utilisant Tapatalk
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Saying about apps which can be added - it's apps which can add more quick tiles...

And about rr - it can be the best! I hope this idea will not leave you :)
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] MRDA1981:
This latest build works well on most things...but it won't read my SIM, for some reason.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] milanmania2004:
Same problem for me. Sim nor detected after flashed ROM.
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Ninnix96:
Building
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Nickkal:
if you or someone else could make the sensors work at custom roms we would pay you enough money to live a month
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] kingracer:
Great, this ROM I'll definitely use as my daily driver :good:
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] satmaster:
View attachment 4320116

I am using RR 5.8.4 from chenzc as my daily driver and I am very satisfied with it.. Ninnix please include also AKT power saver profiles...

View attachment 4320118
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] satmaster:
The back heart rate sensor is recognized also with Sensor data logger app... Red led turns on and measures data on every custom ROM I've tried

View attachment 4320122

..same with UV sensor

View attachment 4320125
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Peedy2495:
Fresh Install: no SIM-Card present

Yesterday I got my new Z2 pro (Z2121).

After installing your ROM (lineage-14.1-20171022-UNOFFICIAL-z2_row.zip with gapps pico) over virgin ZUI my SIM-card will not be detected.

Other ROMs like cosmedd's one will do/work.

Cheers ... Peedy
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] Peedy2495:
Update Fresh Install: no SIM-Card present

To get closer informations, I made exports of dmesg and logcat.

Cheers ... Peedy
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] josuemf:
I also just installed this, but have no working SIM card.

What happened?
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] LeetjeDanhoff:
Hey man, can you send me a link of that RR rom? I can't find it :/
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] satmaster:
https://mega.nz/#!WRERnbaZ!JRLJgyJ8_daGuiMmDhwQxT8loNoHsFnHxu_x-i8Yxfw
[Lenovo Zuk Z2 Pro ROMs, Kernels, Recoveries, & Oth] malcriado:
camera while filming no auto focus!

option auto is on
[Xiaomi Redmi Note 3 Questions & Answers] shravan kumar tela:
Can anybody try to Port one plus stock rom
[Lenovo P2 Guides, News, & Discussion] Audiophile123:
Is there anyone who have tried fiio dac with your Lenovo P2? I have a fiio k1 dac and it doesnt work with my phone but works well with my old samsung j7(2015).Does changing my stock rom help me with this problem?:confused:
[Lenovo P2 Guides, News, & Discussion] Ecto5:
For me i have managed to get it to work a few times. Reconnecting multiple times and it would work 1 out of every 15-20 times. Very unreliable and I'm afraid i'm damaging the phone in the process.

I just use allcast to stream music to my laptop which then outputs to the dac as a workaround.
[Lenovo P2 Guides, News, & Discussion] Audiophile123:
Thanks a lot for your reply.I thought this problem was only with my P2. I have tried as you said.Reconnected multiple times and usb audio player pro plays the music at a very loud volume enough to damage the headphone and then all of a sudden the app crashes.Same case with Neutron music player.Poweramp detects the dac and plays song but no sound is heard.I think any custom rom can help me with this problem:(:(
[Lenovo P2 Guides, News, & Discussion] fburgos:
P2A42 (hardware p2c72) here same problem only charging Fiio X3 first generation, used to work on OnePlus one and Moto G third generation
[Lenovo P2 Guides, News, & Discussion] fburgos:
Reporting again.

Just flashed validus oreo and fiio X3 first generation works like a charm
[Lenovo P2 Guides, News, & Discussion] Mowe1983:
I'm using Lenovo P2 unrooted with Stock.

My Fiio E07K didn't work but I could try some others and the Audioquest Dragonfly as well as the Cyrrus Soundkey work like a charm. The Oppo PM-1 didn't work either.

I'm very happy with my new Soundkey... ;)
[Lenovo P2 Guides, News, & Discussion] srirams:
I'm also using unrooted Lenovo P2 with Stock (P2a42_S224_170725_ROW) .

I confirm that my Fiio Q1 works like a charm...

i havent faced any problem till now regarding the connection...
[Lenovo P2 Guides, News, & Discussion] Spazturtle:
Stock ROM, FiiO E18 KUNLUN fully works.