yashsingh1/xdaforums huggingface dataset:
[Android General] Rortiz2:
Do not take it the wrong way, I do not want to offend. So what this page says is wrong?

https://www.notebookcheck.net/Lenovo-Tab3-8-TB3-850F.231374.0.html

I do not know, this is very weird ...

And no, the last_kmsg says why not booted up. There's no problem if the processors are not the same. You can port a ROM from different processors this is called: CORSSPORTING.
[Android General] pndwal:
No worries - you'll only offend me if you're offensive. :) - were all seeking clarity here!

No, the page is likely correct. As I said in post #87:

So seems TB3-850f uses either MT6735M, MT6735, MT8161P or MT8735P.

Your reference page says MT8161 as does my original Lenovo box sticker (P variant). However, if AF's hunch is correct ("The ro.board.platform in build.prop is autogenerated by buildinfo.sh and will give you the correct chipset pretty much 100% of the time"), it is just as likely we have MT6735m.

But you are consistently referring to MT8163(x), (NOT MT8161(x)) and we simply have no evidence we have that SOC. - And I couldn't even say if its similar or not.

But all the best with cross-porting. I'd be interested to learn of any success you have - it may even help with our device. PW
[Android General] AeonFlux1603:
This LOS 14.1 ROM is based on a mt6735m port. It is not confirmed whether a mt8161p ported ROM will work on the 850f.

As far as a port for Aquaris M8, your best option would be to start with a base ROM from another device that uses the mt8163B and use a standard Mediatek porting guide. I'll get you a link for a good porting tutorial.

Update: here is a concise and straight forward ROM porting guide that is confirmed to work on most Mediatek platforms: https://xdaforums.com/showthread.php?t=2701283
[Android General] Rortiz2:
Thats the problem! There is no LineageOS for MT8163B/MT8163V/MT8163A/MT8163P tablet! And I tried to port a ROM from:

MT6753

MT6735

MT6737

MT6797

MT8173

ETC ETC and none worked.
[Android General] pndwal:
Thanks for that. Had a quick look at guides already, but not found any specific to MT yet. Will do more digging later. Regards, PW.
[Android General] john3voltas:
Hey there.

Thanks a lot to [MENTION=9720847]AeonFlux1603[/MENTION] for this LOS ROM.

I would like to try it out but would like to know if there are any known bugs/annoyances that might detract me from installing it.

Also, this tablet is my daughter's tablet. Her being 'minor aged' I would like to have a kid's mode for her where she can only use the apps/games that I approve and prevent her from browsing the web, etc. Is there such a kids mode in LOS 14.1?

Hope [MENTION=7550078]pndwal[/MENTION] or anybody using the rom can clarify these two issues.

And, by the way [MENTION=9720847]AeonFlux1603[/MENTION], are you planning on releasing security updates for this ROM? Is a LOS 15 in the works? LOS 14.1 should now stop receiving security updates, right?

Thanks in advance.

Cheers
[Android General] EoflaOE:
[MENTION=9720847]AeonFlux1603[/MENTION] Can you make LineageOS 14.1 for TB3-710F?
[Android General] limited_imagination:
In terms of annoyances, I would have to say that reduced battery life is my #1 pet peeve. I have been trying to track it with GSam Battery Monitor, and it seems to arise because the OS is constantly trying to power the phone radio for an LTE connection that doesn't exist on the TB3-850F tablet. The "phone radio" category of the battery monitor shows a significant power draw, even after I switch to Airplane Mode. This must be a legacy from the origin of this ROM in the TB3-850M hardware.

I tried using the dialer to enter *#*#4636#*#* and then bring up "Phone Information", which does give an option to switch off "Cellular Radio Power". But that is only temporary, and the slider switch goes back to "On" immediately as soon as you leave the testing app.

Early in this thread (post #16), [MENTION=9720847]AeonFlux1603[/MENTION] mentioned that he was updating the rom to remove all the LTE vestiges of the TB3-850M that exist, but I'm not sure that he actually got to that point. It's possible that he did, and that I'm accidentally running an obsolete version of this ROM that still contains all the LTE phone radio stuff. But I don't see any reference to that issue in this thread after post #16.

Could someone please clarify the most current version of this ROM? Mine shows security patch dated May 5, 2017, and LOS version 14.1-20170515-UNOFFICIAL-TB3-850M.

As for "Kids' Mode", that is no longer a category that you set up through the settings app on the tablet. You can add new users with their own apps & content, or set up a restricted profile, or download an app for this purpose from the Playstore. But the stock "Kids' Mode" from the stock rom is gone.
[Android General] pndwal:
I'd love some news of progress / tweaks / pending update too.

Yeah - that's the latest we have for TB3-850F - pretty much LOS-TB3-850M_v3.zip (from 4PDA, with our TB3-850F stock kernel substituted, and some tweaks). Version 3 is still the last for TB3-850M at 4PDA. PW
[Android General] Willykit:
Overriding phone permission

Hello everyone!

First of all many thanks for this great rom! I had been looking around for quite some time for a new rom but had no luck with it and had given up on the tablet. Then one day I thought I should look again after a long time and guess what? I found you guys here at XDA!!!

Anyway, I have just flashed the rom on my machine and it runs as smoothly as possible. Great job guys, really!

There is only one small problem which I want to discuss. As we all know this is a port from a 4G rom so naturally there is a phone up etc. The thing is that there are apps that request phone permission in order to work when they think they are installed on a phone rather than a wifi only tablet. One of the is called "NovaGo" and it is the official app of my satellite TV provider.

While I was on stock rom I could login to the app and watch all the shows. Since I flashed Lineage, the app requests to make a phone call in order to confirm my identity as it thinks that it's running on a phone. Is there any way to bypass that?

Thanks again and keep up the good work!!!
[Android General] Talysdaddy:
Hey did you have any progress with your MT8163B tablet? Saw this tablet on sale for only $32, might pick it up if it's "hackable.." Since you were trying some port options, I'm assuming you have or know where the "goodies" are and wouldn't mind sharing? Like, how to unlock the bootloader and maybe a working TWRP or similar? Haven't found much on this thing, you're like the only other person Google's found on this... Hopefully, you've made some miracles, more than what's indicated here...

By the way, after reading the convo here, dude mentioned to find another device with the same chip and try porting from one of those other devices. But your last reply said you tried porting like 5-7 different devices, all with different chips, I think you misunderstood him there. He meant other MT8163B devices, unfortunately, I didnt too many available, there was an ASUS ZenPad 10 Z301M that hacked, unlocked w/ TWRP and a few ROMs. Might wanna check that out if you're still messing with it.
[Android General] Rortiz2:
Hi.

I ended compiling for my tablet;)

https://xdaforums.com/android/software/cyanogenmod-bq-aquaris-m8-t3973831/post80355625#post80355625

Regards.
[Android General] pndwal:
Hey, well done with that!

The LOS 14.1 (N) for our TB3-850F (WiFi model) is actually a ported LOS from TB3-850M (LTE model) which, as you know, uses a different chipset, but in fact has an unaltered kernel from stock Marshmallow ROM.

Knowing this was stock M kernel led to a breakthrough moment for TB3-850F when [MENTION=8548258]wezroot2k[/MENTION] stabilised the ROM for our device by recompiling the ported boot image with TB3-850F stock M kernel.

Just thought this info might be useful for your CM 6.x (M) ROM. If you can find a close cousin device with LOS 14.1 (N), you may be able to move up to that simply by recompiling it's boot.img with your Aquaris M8 stock M kernel too.

Guess you may even be able to use LOS 14.1 from here, but I haven't compared devices.

Please let us know if that's useful. PW
[Android General] Rortiz2:
Hi,

Not too easy ;) You need to replace vendor blobs aswell since they're device-specific. I already built LineageOS 14.1 from source but resulted in a black screen with adb.

This is due a lot of missing symbols. I finally stopped working on LineageOS 14.1 because it was almost impossible for me. If you guys want compiled CM 13.0 for your Lenovo Tab, just let me know, I will see if I can compile for you.

Regards.
[Android General] pndwal:
Ha ha - yes, seems we're lucky to have really close cousin in tb3-850m. Probably pretty much the same hardware! (+LTE stuff.)

However, we have little more than LOS for 850m (LTE model) (originally ported by russian 4pda member from ARK-Impulse-P2, but working beautifully on our Lenovo devices - though I don't know what they did with blobs!) with 850f (WiFi) stock kernel substituted. Despite best intentions, LTE stuff is still there.

I think most are happy with LOS 14.1 on our device, but really appreciate your offer. Only reason some might like CM 13.0 is due to LTE stuff interfering.

For example, some have gone back to stock due to difficulty getting out of hardware wizard which gets stuck / crashes looking for phone Comms. Others have problems like this:

So if you have any advice / can help with hiding phone comms from the system for TB3-850F LOS 14.1 (or refining likes of setup wizard), that would be fantastic for us :) ...

...Sorry didn't help much with your ROM / device ☹️ . Regards, PW
[Android General] Rortiz2:
To fix LTE related problems this needs to inlcude a file named "common_full_tablet_wifionly.mk" in device.mk which defines that the device for what we are building for is a tablet that doesn't uses any LTE/3G connection. This will also define that the tablet doesn't uses sim card so the setup wizard will not show any network/sim card related stuff.

To inlcude that file, you need to rebuild the ROM from source and since you can't... That's why I asked about CM 13.0. I can easily use the device tree from my Aquaris M8 and build a working a CM-13.0 ROM without LTE problems.

Regards.
[Android General] pndwal:
Thanks!

So it sounds like a simple solution, but it ain't? It's a shame, but in that case I'm sure proper CM 13.0 would be appreciated by some here for reasons mentioned. (For me LOS 14.1 is fine... For now...)

If it's easy to build, that would be great... Do you then use original hw blobs from stock 850F ROM? - (I still don't fully understand the process ?).

Many thanks, PW
[Android General] Rortiz2:
Hi,

To do that, I just would need stock system image, boot image and recovery image.

I'm basically going to "adapt" this tree to the 850F: https://github.com/mt8163/android_device_bq_aquaris_m8/tree/cm-14.1

Best Regards.
[Android General] pndwal:
Super! So we can end up with LOS 14.1? Or did you mean CM 13.0? :confused: (need blobs from our 14.1?)

Anyway, please let me know what links you need to find! Thanks and regards, PW
[Android General] Willykit:
Wow! I'm really excited there's still people who wish to compile a rom for this tablet. Actually I would flash any working rom other than the lenovo stock rubbish. It's a great tablet but it's software makes it pretty much useless so if you can spend some time to compile cm 13 for the TB3-850F I would really appreciate it ;)
[Android General] pndwal:
Did you try our LOS 14.1? PW
[Android General] Willykit:
I did and although it made the tablet faster I had to go back to stock as I couldn't use my tv provider app (NovaGo) as it kept asking to grant it phone permission and then it crashed.

So, my only option is to flash a "stable" rom that is not ported from a phone version as I 'll have the same issue again.
[Android General] pndwal:
Ah - didn't make the connection! :silly:

[MENTION=8978978]Rortiz2[/MENTION]'s LOS or CM ROM would be great for you. Hope you get it! PW
[Android General] Rortiz2:
I still waiting for stock system image, boot and recovery ;)
[Android General] pndwal:
Woops :(

-Latest stock: lenovo-tab3-a8-tb3-850f_s100030_161209_row.rar

Direct link:

https://drive.google.com/file/d/1-CF58uGTWKhx-xXguY701BoFFQpoSj13/view

Or

https://drive.google.com/uc?id=1-CF58uGTWKhx-xXguY701BoFFQpoSj13&export=download

Pass (needed?):

https://firmware247.com

-Older stock: TB3-850F_USR_S100023_1604141138_MPMO._ROW.zip:

Direct link:

https://drive.google.com/file/d/0B9CTflWzW6T0QnFncnZQV0Qxa1U/view

Or

https://drive.google.com/uc?id=0B9CTflWzW6T0QnFncnZQV0Qxa1U&export=download

All working ROM links I have are here:

https://xdaforums.com/android/general/guide-lenovo-tab3-8-tb3-850f-t3559786 posts #552, 594, 596, 600

Also, [MENTION=1369452]chimpsinties[/MENTION] posted a working ROM link here recently:

https://xdaforums.com/android/help/lenovo-tab-3-8-tb3-850f-unbrick-root-t3598727 post #88

Sorry I kept you waiting. :) PW
[Android General] Rortiz2:
Thanks, started downloading. Tomorrow will start doing all the needed trees to build:fingers-crossed:

Yeah, will be LineageOS 14.1. It would be nice if we can get the device tree from the original phone from where it was ported;)

EDIT: Just downloaded firmware and... MY FRIEND IS HERE xddd. I mean, this tablet uses signed images as my Aquaris M8 lol. No worries, I have a tool for that in my github.

Regards.
[Android General] pndwal:
This is great news! Thank you.

If you mean device tree for LOS 14.1 in this thread, all I know is what was said in original posts with the ROM in Russian 4PDA TB3-850M(incl F) thread, ie it was originally ported from "ARK-Impulse-P2".

Hope it all goes smoothly for you, signing images etc. Looking forward to testing!

Thanks and regards, PW
[Android General] wadywadywady:
Thanks again and keep up the good work!!!
[Android General] pndwal:
Hi Rortiz2.

Please let us know if wheels are still turning or something hit the spokes! Hoping the ball's still in the air! Kind Regards, PW
[Android General] Rortiz2:
Hi,

I'm still working on it. I just got a flu this days..

Can someone try this compiled TWRP?

https://www.androidfilehost.com/?fid=4349826312261719606

Regards!
[Android General] pndwal:
Great stuff! (Not the flu though, especially if it came from China...)

Was just checking it's still cooking :) -many thanks, take time, hope you're feeling better, & I'll try up-to-date TWRP asap. :good: :good:

You're a champ! PW
[Android General] Santi_SAZ:
I will try this TWRP

My tablet is fully stock and I've read the procedure to flash the recovery in the other thread, but I have one question; is still needed Magisk to boot properly with this recovery? I suppose latest Magisk will work

---------- Post added at 03:38 PM ---------- Previous post was at 03:36 PM ----------

Many thanks for the recovery

Waiting eagerly for your LineageOS build when it's done
[Android General] Rortiz2:
Hola,

No, Magisk is not needed.

I just want to know if it boots. I mean, at this moment i'm like blind since I don't own the tablet.

There's no need to flash it tho. Just do

fastboot boot twrp-3.1.1-1-TB-850F.img

PS: Es posible que me suenes de HTCMania? xD

Regards.
[Android General] Santi_SAZ:
Ok, I let you know if it boots, but I need download stock ROM, and other stuff.

En HTCMania uso el mismo nick, es posible que hayamos coincidido en algún foro.

Gracias por darle vida a la tablet [emoji4]
[Android General] pndwal:
Boots! & Flashes fine!

Fantastic. Gone from 3.0.3 to your 3.2.3-0.

Can't check anything in Mount except Micro SD.

File manager sees /, /external_sd, /sys, /etc,.. but nothing in /system, /data

Thanks! Looking forward to further testing. Kind regards, PW
[Android General] Rortiz2:
Hi,

Thanks for the report:)

So,

Boots.

Display/Resolution/Touch OK

MTP/ADB OK

Errors while mounting any partition?

Decrypted userdata correctly?

To see the contents of /system do in adb shell

adb shell mount system

And to unmount it, use

umount system

(Yes, umount, not unmount)

I need to know if it's fully stable to release it:)

Regards!
[Android General] pndwal:
Not quite there yet!

Boots ✓

Display/Resolution/Touch OK ✓

MTP ✓X

-PC Showing SD card only.

ADB ✓X

-"adb devices" returns serial no. & "recovery".

-"adb shell mount system" returns "- exec '/system/bin/sh' failed: No such file or directory (2) -".

-"adb get-devpath" returns "unknown".

Errors while mounting any partition? ✓X

-SD mountable in TWRP.

-Nothing else mounts. (Can't place a check in any box in 'Mount' other than for 'Micro SD card' as mentioned).

Decrypted userdata correctly? X

-File manager sees nothing in /data (including userdata), or /system as mentioned.

Additionally:

-Reboot System or Power Off warns "No OS Installed! Are you sure you wish to reboot?" But system boots fine.

-Time is correct when change timezone for winter time. Checkbox for summer time (DST) has no effect (common TWRP glitch :) ).

Trust it will help!

Kind regards, PW
[Android General] Rortiz2:
Hi,

Thanks for the feedback. Very appreciated.

Want me to PM you for not spam this thread?:)

Regards!

PS: If somebody wants the device tree is here: https://github.com/R0rt1z2/android_device_lenovo_TB3_850F
[Android General] pndwal:
Personally, I'm happy to see such relevant info here, but it is [MENTION=9720847]AeonFlux1603[/MENTION]'s thread. PM is fine too.

Great to see this on GitHub. Regards, PW
[Android General] codryn:
After installing this rom in twrp I have infinite bootloop.
[Android General] LightningNight:
I just barely unlocked and installed the original twrp...so I haven't tried your latest yet.

Mostly, I was just reading through this entire thread so I could decide if I wanted to dive into Lineage.

It seems like most are happy users, except for the LTE bits still hanging around. But it also seems like there might be another recompile coming along soon which will have some new updates?

Did I read all of that correctly?
[Android General] pndwal:
Yep, you seem pretty much up to speed. Seems you found the thread now used for general discussion too. Well done with installing TWRP and rooting.

Current LOS 14.1 works well, very few bugs other than LTE remnants (some had difficulty completing initial setup wizard for this reason). It's a good way to move from M to N, if with limited performance benefits (thought bugs with adopted storage with M are gone).

History:

[MENTION=6939319]Hemphiz[/MENTION] did much initial work here. Then [MENTION=7383447]MotoJunkie01[/MENTION] took over threads, worked hard on modified stock ROMs and LOS 14.1 which he reported completed and was fine tuning, but due to an altercation with a member he refused to publish this before going AWOL and having XDA account disabled.

Finally, through some collaboration, [MENTION=8548258]wezroot2k[/MENTION] was able to merge files to make boot.img which allowed LOS 14.1 port (from Russian 4PDA site) for TB3-850M to work stably on TB3-850F. :good: :good: :good: [MENTION=9720847]AeonFlux1603[/MENTION] then created this thread for it and made some improvements, but we haven't heard from him for a while.

Now [MENTION=8978978]Rortiz2[/MENTION] is working on a ground up build of LOS 14.1 for us. He has already published a TWRP test build. He may be taking a break at the moment. And that is where we're at to date. Regards, PW
[Android General] CthulhuInMyBrain:
Good news,bro! Will be waiting for test)
[Android General] gorgos10:
hello,after formatting previous 14.1 lineage os of yours via twrp,after installing the same rom again it reboots to twrp recovery again!why?
[Android General] beastobadness:
Thanks for this ROM, breathed a bit of new life into my daughters ageing tablet which is due to be replaced later this year. Bit of a learning curve but eventually got there once I had the bootloader unlocked and TWRP/Magisk installed. Don't really use adb very often but MotoJunkie01's guide was very useful.
[Android General] eerozeteen:
Hi,

I tried install Lineage14.1 from this topic. Everything was ok, until i didnt make "factory reset" from Android. After it, my tablet restart every time into twrp... When i try install rom again, its still reboot to recovery... how i can fix it? What i do wrong?

EDIT

I recovery my tablet via spflashtool. I will try again after all OTA updates....

This build (from first post) is the most actual alternative rom for 850F ?
[Android General] remrendes:
I just installed the image and a boot screen says Welcome to your Lenovo TB3-850M, but a thread says TB3-850F.

Then I can not set up as a new or copy a data from any other device or cloud, because a setup wizzard has stopped.

What can I do now?

I tried to reisntall with a twrp-3.3.1-1-TB-850F.img. First time I tried with an older version, but nothing changes.
[Android General] pndwal:
See this from OP:

PW
[Android General] MightyFalcon:
I kind of feel bad for bringing this old thread back, but wanted to ask if any further work has been done with this project? I am kind of curious if the SIM settings were ever removed but the version was never uploaded, also would thoroughly enjoy a release with no gApps so I can use MicroG instead. This old tablet still gets plenty of mileage and this project was truly a work of art in terms of keeping me from handing this tablet down.

Thanks for the great work guys!
[Android General] Cyphos84:
Thank you so much! Now i need to TRWP my tablet :)

PD: Would be great a release with no gApps, to use MicroG instead too.
[Android General] BlindMan2020:
Sorry to bump the thread as I am wondering is there any sort of custom rom available for lenovo yoga tab 3 8 yt3-850m as I know I'm in the wrong thread as I already searched all over the internet and there's nothing available only root/unroot/twrp options that is found
[Android General] Crisdax:
NO WORK THIS ROM MY TWRP say : THIS THIS ZIP FILE IS CORRUPT
[Android General] Viva La Android R.I.P.:
Did you ever get the ROM to flash properly?
[Android General] Viva La Android R.I.P.:
I have been searching extensively and I wanted to ask here, would any of you all happen to have a link or source to the LineageOS 16.0 (Android 9 Go Edition) ROM for the TB3-850F? I originally found the ROM on a Telegram group and it worked flawlessly. Very lightweight yet snappy. After flashing back to stock, my micro SD later ended up becoming corrupt; I lost both this ROM (LOS 14.1) and the LOS 16.0 ROM. I was able to find a link for this ROM but not the latter. Does anybody have any input on this? Thanks.
[Android General] Viva La Android R.I.P.:
Not sure if you are still interested, but I am currently in the process of continuing this project. I have been unable to make contact with the OP despite many efforts. Accordingly, I am taking it upon myself to pick up and maintain this ROM to a limited degree. I do want to hash out the WiFi-only settings and dispense with telephony and SIM- related device settings. I will also strip the ROM of all GApps and bring the security patch level more up to date. The libs need updating as well as some of the system-level services. I will post updates to my progress here, but I am considering a new thread. I am also trying to locate an Android 9 Go Edition ROM (LOS 16.0 Go Ed.)for this device that I once had but have since lost. I would love to maintain that ROM as well.
[Android General] pndwal:
Many thanks in advance!!!

I never heard about anything later than 14.1 for this, so I'd be very interested in that too... PW
[Android General] Viva La Android R.I.P.:
It's really lightweight and basic (includes the standard Google Go Edition apps), and not many customization features, but what it lacks in luster it makes up for in performance. Really responsive and fluid. I've ran myself crazy trying to find a copy of it. The Telegram group where it originated, hosted by a former Tab3 8 OP here on XDA, is no longer active. I've reached out to some of the guys at Android Central, Telegram, Discord and 4PDA, to see if they might have a copy. Basic as it is, it's something I'd love to expound upon and maintain. It's perfect for the limited hardware capabilities of the Tab3 8. I would have thought for sure somebody here on XDA would have it.
[Android General] pndwal:
Yup... I just checked briefly on 4pda... So far no go. 🙃