yashsingh1/xdaforums huggingface dataset:
[Thinkpad Tablet Android Development] Acel337:
I am having an issue when setting up with a child account to this tablet (Lenovo TB-8704F) "this profile manager is required for google accounts managed with family link".

Tablet is on the latest version of this rom (20200906) with also latest OpenGapps (nano). Issue occurs after clicking next on Activate Family Link Manager.

It runs fine with normal account with all apps. Also tried installing the family link app before adding account.

Please help as I do not have another tablet spare and need it for my very curious 7 year old.
[Thinkpad Tablet Android Development] Ecthelion3:
To me this sounds more like a problem with Google's Family Link app than a problem of the ROM here. So you might want to do a Google search for the above error message and search the answers on the Google support pages. E.g. https://support.google.com/mail/thread/4355255?hl=en sounds similar to your problem.
[Thinkpad Tablet Android Development] adannyo:
wifi doesnt work for me on the wifi only tablet. Installed 20200906. Click the wifi button, thinks about it for a minute, then disables wifi again.

Also, the finger print sensor doesnt work.
[Thinkpad Tablet Android Development] swieder711:
I had this problem. I fixed it by starting over with a clean installation of the ROM. Good luck.
[Thinkpad Tablet Android Development] adannyo:
Cheers for the tip, but that didn't work. Tried 3 times and same problem each time. Finger print and WiFi both refuse to work on my 8704f.

Decided to revert back to original 181108.

The ota update breaks WiFi completely.

Lineage 16 breaks the external speaker and WiFi is inconsistent.

Lineage 17 breaks WiFi and finger print completely.

Installing ROMs had always been a challenge. Only way I can get ROMs to install is flash the stock system.img and boot.img on a completely wiped device, boot the system and let it encrypt, then once at language selection reboot to twrp, dirty flash desired ROM and use.

Anything else results in boot loop.
[Thinkpad Tablet Android Development] Acel337:
I have managed to get it working now by installing 'PixelExperience 9.0 for Lenovo Tab 4 8 Plus'.

Not sure why it works but it may be due to Android 10 and works only up to 9 ?
[Thinkpad Tablet Android Development] jovian.parco:
First time doing a custom rom please guide me

I have installed twrp and magisk but the thing is that I have to enter a password everytime i opened twrp will it be a problem?, Also my device is stock 8.1 so whats format data as data loss?
[Thinkpad Tablet Android Development] Ecthelion3:
You should find some instructions here in this thread. If that does not help, on the LineageOS pages there are installation instructions for a lot of devices where the installation is similar to our Tab 4 8 Plus, e.g. https://wiki.lineageos.org/devices/osprey/install for the Moto G3.
[Thinkpad Tablet Android Development] mistersixt:
[MENTION=7737930]highwaystar_ru[/MENTION] ...any chance to bake a version with the latest security updates?

Kind regards,

mistersixt.
[Thinkpad Tablet Android Development] Pedros97:
Here is the last november 2020 update.

https://9.dl.webshare.cz/7008/AwaSG...2/lineage-17.1-20201110-UNOFFICIAL-TB8704.zip
[Thinkpad Tablet Android Development] ocyrus99:
Thank you so much for this! I have a 8704V (2G variant) stuck at 7.1 and it was borderline unusable for anything more than an e-reader with the factory image. This has made it much more enjoyable to use.
[Thinkpad Tablet Android Development] ocyrus99:
I have the same problem. Also tried the build posted by Pedros97 and it's still there.
[Thinkpad Tablet Android Development] julian67:
This image doesn't work with my TB-8704F. I had to do a full reset and start over with highwaystar_ru's ROM from the first page of this thread.
[Thinkpad Tablet Android Development] mad4some:
I dirty flashed this on top of 9/6 build with no issues at all.....TB-8704F. These tablets can vary though, even same model....
[Thinkpad Tablet Android Development] theletterj:
Probably not a huge priority, but has anyone gotten DS4 controllers to work with this ROM? I can get it paired, but that's pretty much it. Tried the 1Controller Magisk module and it didn't seem to make a difference and connecting it OTG also didn't work.
[Thinkpad Tablet Android Development] WiteWulf:
What's the source of this? No offence intended, but I'm not downloading and installing an OS update from some file sharing site without knowing who built it and trusting their work. I'll happily do so for updates provided by reputable members of this community, however.
[Thinkpad Tablet Android Development] ashu.droid:
Are there any chances of android 11 for TB-8704X or December update to previous running version(not a security update).
[Thinkpad Tablet Android Development] drshaheedbams:
any updates coming soon bro?
[Thinkpad Tablet Android Development] Stolonifer:
I can't find any option to turn on VoLte. Even the VoLte provision flag is missing from *#*#4636#*#* . What should I do .. my Jio sim is not working due to this . Other sims are working but I use Jio . Plz help
[Thinkpad Tablet Android Development] fivemoreyears:
what's the method for passing safetynet? I saw it randomly while browsing the threads one time but can't find the the post anymore

Edit: Figured it out. Download magisk props module, use termux app and set fingerprint to google pixel 4.

Thank you to the rom/twrp creators as well for keeping this tab alive (y)
[Thinkpad Tablet Android Development] RoottoBoot:
Thank you for this Rom! I'm new to rooting and custom Roms but having fun learning. I have the tb-8704v it has always been the most annoying launcher and slow, much beter now. thank you for that. I have everything working including Magisk. the only issues I'm having is Bluetooth keeps stopping, it has not passed SafetyNet but I have not tried the fix posted by Lancebuks. Any help with the bluetooth issue would be greatly appreciated.
[Thinkpad Tablet Android Development] RoottoBoot:
ThankYou "Lancebuks" fixed my SafetyNet with Magisk.
[Thinkpad Tablet Android Development] RoottoBoot:
Tried everything for Bluetooth nothing is working anybody have any ides?
[Thinkpad Tablet Android Development] scott.e:
I also have a "v" and am experiencing the same problems with Bluetooth. I have a clumsy workaround in that I plug a stand-alone LE Bluetooth transceiver into the earphone jack and by-pass the built-in Bluetooth.

As the other Tab 4 8 Plus variants don't exhibit this problem, I will hazard a guess that the image file that is necessary for the "v" to boot has set a flag incorrectly or overwritten an environmental variable necessary for the Bluetooth to function. Also, any attempt to load a third-party Bluetooth program causes the tablet to crash. This indicates that the program exception handling is not functioning either as a call to the Bluetooth driver isn't handled properly.

Can any of the code mavens in this forum contribute something more than a guess? Thanks in advance.
[Thinkpad Tablet Android Development] Pedros97:
Source code od hi

Source code on the 1 page highwaystar_ru i am update only security patch.
[Thinkpad Tablet Android Development] fivemoreyears:
any gcam recommendation's for this tab? 🤔
[Thinkpad Tablet Android Development] Ecthelion4:
Gcam Go does work.
[Thinkpad Tablet Android Development] Here's Jonny:
Hi,

I'm looking at updating my TB-8704F.

New it was on Android 7, then OTA updates to Android 8.1

I've read through most of the posts, which TWRP, OS and GApps do you recommend flashing on the F version ?

How is performance compared to 8.1 ?

Do I need to apply Magisk ?

Thanks :)
[Thinkpad Tablet Android Development] Here's Jonny:
Hi again.

I decided to have a go at installing.

I've used lineage-17.1-20200906-UNOFFICIAL-TB8704.zip, TWRP-3.4.0-0_TB-8704F.img and GApps Nano.

So far everything seems to work, but I've noticed there is no Netflix showing in the Play store.

I've not installed Magisk or rooted etc, how do I get that to work ?

Thanks
[Thinkpad Tablet Android Development] WiteWulf:
You'll find the answer on the previous page of this very thread: #243
[Thinkpad Tablet Android Development] Here's Jonny:
Thanks I'm assuming this means I'll need to flash Magisk. Is there a link to the correct version ?
[Thinkpad Tablet Android Development] WiteWulf:
GitHub - topjohnwu/Magisk: The Magic Mask for Android

The Magic Mask for Android. Contribute to topjohnwu/Magisk development by creating an account on GitHub.

github.com
[Thinkpad Tablet Android Development] Here's Jonny:
Thanks

I've downloaded Magisk v21.2 rebooted into TWRP, pushed the zip file to the table and then selected install.

It's been sat at 'Adding addon.d survival script' for about 10 minutes..

Is there anything I can do ?

Thanks
[Thinkpad Tablet Android Development] Here's Jonny:
All sorted. Installed Magisk using the patch method, updated my fingerprint and now Netflox installs and works.

I'd like to back up the rom now it's working, I've gone in to TWRP and selected Backup. Left the default options and swiped to continue, it outputs a couple of log and then stops at "updating partition details.." After that not much seems top happen.

How long should that part take ?

This is what I see after an hour:

Data successfully decrypted, new block device: '/dev/

block/dm-0'

Updating partition details...

...done

Successfully decrypted with default password.

Updating partition details...

...done

Full SELinux support is present.

MTP Enabled

Updating partition details...

Thanks
[Thinkpad Tablet Android Development] Here's Jonny:
Morning. Any one any ideas on how I can backup in TWRP ?
[Thinkpad Tablet Android Development] giorgakis1966:
Hi Guys. Is there a complete guide with the files you need? I have Lenovo tab4 8 plus tb8704X
[Thinkpad Tablet Android Development] Here's Jonny:
Does this rom (2020-09-06) support seedvault ?

Thanks
[Thinkpad Tablet Android Development] Here's Jonny:
Quick update on my issue with TWRP, this is now working.

I've had to boot into twrp-3.2.3-0-tb_8704x.img not TWRP-3.4.0-0_TB-8704F.img to get this working.

Is there an issue with TWRP-3.4.0-0_TB-8704F.img ?

Thanks
[Thinkpad Tablet Android Development] giorgakis1966:
Hi. What is the correct file Gapps to TB-8704X? I can not install anything .... nor .apk. I have only installed it rom. Please help me. Thank you
[Thinkpad Tablet Android Development] drshaheedbams:
ANY UPCOMING UPDATES SIR?
[Thinkpad Tablet Android Development] hunnia41:
I would like 18, but perfectly happy with the 17.1. Maybe, looking at this tread, with all the questions and problems, the developer thinks, that it is more headache, than it ie worth it. But I keep my fingers crossed. :-)
[Thinkpad Tablet Android Development] Paragonic:
Compatible with Lenovo TB-8705F?
[Thinkpad Tablet Android Development] hunnia41:
TB-8705F is TAb 8 not tab4 8 plus
[Thinkpad Tablet Android Development] GildroY:
I have the LTE version of the tablet - TB8704X. I installed the rom with gapps as per the instructions - no errors or issues anywhere.

But it is stuck on the lineage animation boot screen since more than 30 mins now.

Looking for some help, what could be wrong?
[Thinkpad Tablet Android Development] GildroY:
Nevermind. I flashed the latest TWRP 3.4.0 and it worked just fine.
[Thinkpad Tablet Android Development] giorgakis1966:
What instructions did you do and which version gapps did you install? Thanks.
[Thinkpad Tablet Android Development] GildroY:
I followed the instructions as is from the OP in this thread and also from this: https://xdaforums.com/t/twrp-and-ro...f-v-tb-x704l-f-tb-8504x-f-tb-x304l-f.3664407/

The only difference was to use the latest TWRP (3.4.0: https://xdaforums.com/t/recovery-tb...-twrp-3-4-0-0-for-lenovo-tab4-8-plus.4134151/) and it worked fine for me.
[Thinkpad Tablet Android Development] GildroY:
Primary camera is not working for me. Is anyone else facing the same issue?
[Thinkpad Tablet Android Development] giorgakis1966:
I have seen these my friend, but they confuse me because they do not clearly say which specific Gapps to download for 4-8-10-plus-tb-8704x and for twrp . Can you give me the link download? Thank you
[Thinkpad Tablet Android Development] GildroY:
Open Gapps ARM64 Pico.
[Thinkpad Tablet Android Development] Here's Jonny:
Has any one got any details on how we can get the latest release of Lineage on this tablet ?

Thanks
[Thinkpad Tablet Android Development] GildroY:
Primary camera and led flash are not working for me. Has anyone else faced such an issue? Looking for some help.

I have already tried wiping it clean and reinstalling TWRP, ROM and GAPPS (pico).

The primary camera is not even showing up on the camera app and also flashlight is disabled on the quick toggles.
[Thinkpad Tablet Android Development] Here's Jonny:
Main camera and flash light work fine on my 8704F.
[Thinkpad Tablet Android Development] WiteWulf:
Same here, 8704F running lancebuks' last release (Sept 6th, 2020)

Only thing that doesn't work for me is tap to wake, but I believe that's common across all models and is a known issue.
[Thinkpad Tablet Android Development] Ecthelion4:
Working fine on my device.
[Thinkpad Tablet Android Development] GildroY:
Ok. Thanks a lot for the confirmation. Not sure what's the issue with mine. I also tried installing pixel os based on Android 9, same issue.

However with the default/stock rom, I was able to access primary camera and flash.
[Thinkpad Tablet Android Development] GildroY:
Pro and learned devs. Any help will be appreciated. My Primary Camera and Flashlight are not working.

TB8704X, LTE 3GB/16GB variant.

I have tried everything that I could:

- wiped clean all the data and re-flashed multiple ROMs - this one, Pixel OS (Android 9)

- removed my SD card that I was using as extended storage since mine is a 16GB version, wiped the data and flashed ROM again.

- Flashed without Magisk

- Disabled access to Camera from all the apps accept the system app.

None of this worked.

- 3rd Party Camera apps also do not detect primary camera but just the front one.

- 3rd party flashlight app showed the message: your flashlight and camera are in use with another app.

I dont have a windows PC so could not flash the stock ROM back on the tablet to test using QFIL. But I clearly remember that Primary Camera and Flashlights were working with stock.

Any help with an alternate way to flash stock ROM via Ubuntu will be great.

Many thanks in advance.

Please let me know if any additional information or logs can help
[Thinkpad Tablet Android Development] Stolonifer:
Is VoLTE working for you ? Plz help cause not working for me.
[Thinkpad Tablet Android Development] GildroY:
Yes volte is working fine. Jio (India) is working as well, in case that was also your question.
[Thinkpad Tablet Android Development] Stolonifer:
I installed two times ... Then why it's only with me ... What steps u followed ? Plz help if I am making any silly mistake.

I checked the VoLTE provisions and there was no option for that , not even the toggle.
[Thinkpad Tablet Android Development] Stolonifer:
Should I dirty flash ?
[Thinkpad Tablet Android Development] GildroY:
I have no idea sir, I myself am a noob. I myself am facing issues with primary camera and flash. Sorry, can't be of much help.
[Thinkpad Tablet Android Development] GildroY:
Any help or suggestion here will be appreciated. Many thanks
[Thinkpad Tablet Android Development] albert_htc:
Hi

Are there any plans to update this rom to the latest 17.1 or 18 builds ?

If not does anyone have a guide on how to take the current build and update it to the latest ?

Thanks
[Thinkpad Tablet Android Development] Stolonifer:
Can u upload gdrive link plz . This is too slow and site isn't opening 🤷🏻‍♂️
[Thinkpad Tablet Android Development] scott.e:
1/25/21 Some additional information that may serve to focus the problem. If I plug my headphone into the device and then attempt to return to the internal speaker by unplugging the headphones, I hear nothing. The headphone jack is still functioning but the internal speaker will not. I have to reboot the device to return the function to the internal speaker. If Bluetooth cannot access the audio data stream because it is routed to the DAC supplying the internal speaker or the headphones, that could cause the diver to crash.
[Thinkpad Tablet Android Development] pompyz:
Has anyone updated with the above said ROM and how is the overall experience and is everything working fine ???
[Thinkpad Tablet Android Development] pompyz:
Hey.....Any updates on releasing LOS 18.x for Lenovo Tab 4 8 plus from your side. Awaiting eagerly for an update....Thanks in advance !!
[Thinkpad Tablet Android Development] dahawthorne:
Yes, I've been using it since shortly after release and everything that I use works fine.
[Thinkpad Tablet Android Development] mistersixt:
More important: could someone please build a 17.1 version with a recent security patch level, like 02/2021? Or could someone write a small howto of how to build and patch the current source? I am happy to provide builds by myself like every 3 months or so.

Kind regards, mistersixt.
[Thinkpad Tablet Android Development] pompyz:
Did you do a Clean Flash or a Dirty Flash on top of the highwaystar_ru 's ROM mentioned on the very first page of this thread??

Also pls. tell us whether DT2W, Bluetooth, Fingerprint Lock and VOLTE are working fine as well ??
[Thinkpad Tablet Android Development] dahawthorne:
Dirty flash.

DT2W no - that's what the fingerprint reader is for.

BlueTooth yes.

Fingerprint UNlock yes (I'm guessing that's what you meant).

I don't have VOLTE in the UK.
[Thinkpad Tablet Android Development] pompyz:
Any new update 🤔 ?????
[Thinkpad Tablet Android Development] dahawthorne:
Oh dear, once again I've made this mistake of trying to help a junior member despite my earlier resolution not to bother with them. Once again I find another junior member who asks a question and doesn't think it appropriate to take the time to press the "thanks" (or in this new XDA app, the "like" button) but instead just demands even more.

That's it for me. No more help for junior members. I despise ingratitude and greed.
[Thinkpad Tablet Android Development] Lun4cy:
Edit: did reflash the stock firmware via LMSA (amazing tool) and it works again. So now i only need advice what went wrong with my flashing process.

Edit 2:

Damn this is annoying. Booting TWRP 3.2.3-0 it can't mount or format data hence it can't flash and gets getting stuck there. Booting TWRP 3.4.0.0 it does mount data but if i try to flash without formating data first, it gets stuck while flashing. When i do format data, flashing works but when it reboots i get the encryption crap again.

Hey Guys,

i've got a problem after flashing the latest unofficial LOS 17.1 build posted somewhere in this thread. So here is what i've done coming from the latest Lenovo update:

- booting via adb reboot bootloader

- loading twrp via fastboot boot recovery.img

- making a backup of everything

- formating data

- flashing lineage-17.1-20201110-UNOFFICIAL-TB8704

- flashing latest GAPPS Pico

- flashing Magisk v21.4

- Wiping Cache and Dalvik

- reboot to System

Now i'm facing the following problem:

- when booting it shows a screen with encrypting - when reaching 2% the Tablet shuts down and reboots (pic 1 and 2)

- now i get a screen that it can't load Android system with the options to try again and factory reset (pic 3)

- when chosing "try again" i get the "Encryption unsuccessful" message (pic 4)

- when chosing "factory reset" it does that and starts with the encryping screen again

I used TWRP-3.4.0-0_TB-8704F from lancebuks since the one provided in the TWRP thread couldn't back up and did not flash because it couldn't mount "Data".

Any ideas what went wrong and how to fix it? Thanks in advance.
[Thinkpad Tablet Android Development] Ecthelion4:
Have you tried setting up the system without Magisk? It could be that it's Magisk that is causing these problems here. The only other difference to my setup, that I can spot, is that you are using the November build of LOS for the Tab 4 8 plus, while I am using the version before.
[Thinkpad Tablet Android Development] Lun4cy:
Yeah i did. Without Magisk, without Gapps...nothing works.
[Thinkpad Tablet Android Development] Ecthelion4:
What about the LOS version from Sept. 6th? That's the version I am using and which is running fine on my device. It can be found in the first post of this thread.
[Thinkpad Tablet Android Development] Lun4cy:
Tried the version from the first post and wiped/formatted the crap out of this Tab - again and again. Seems to be working, after the initial encryption screen and rebooting from it. Jesus, the worst flashing procedure i've ever encountered.

Here is what i did:

- booting via adb reboot bootloader

- flashing twrp 3.4.0.0 via fastboot

- formating data and wiping everything 3x times

- flashing lineage-17.1-20200906-UNOFFICIAL-TB8704

- flashing latest GAPPS Pico

- flashing Magisk v21.4

- Wiping Cache and Dalvik

- reboot to System

- changing the fingerprint to pixel 4xl for safetynet pass
[Thinkpad Tablet Android Development] hunnia41:
On my machine long time ago I needed a passwd/Pin number to do the encryption, decryption. I do not remember when was it requested. I used the same pin no. I used in the stock.
[Thinkpad Tablet Android Development] WilburT:
I've installed 17.1 on my TB-X704F and all I can say is a big THANK YOU to everyone on the development team. You guys are amazing! The most challenging part of getting my Tab 4 10 Plus (WiFi only) updated from the stock 7.1.1 provided by Lenovo was installing the USB fastboot driver on my PC :) Its been two weeks now and I've not experienced a single issue. In fact, the tablet is running much better than it ever did with the stock OS. Bluetooth, Camera, everything works. Lenovo really should do more to help the developer community. I can't imagine how many people have perfectly good H/W in need of an update... Thank you XDA developer community!
[Thinkpad Tablet Android Development] dave457:
I just flashed this today on a 8704F. No issues with flashing ROM and Pico gapps. Still doing initial boot at the moment but I really hate that Lineage boot animation. It's so boring. Has anyone produced a better one?

Update: I thought it was taking too long to boot. I flashed TWRP 3.4.0-0 instead of the previous 3.2.3-0 I tried, then flashed ROM and Gapps again and it's booted fine now.

The only issue I have found so far is the compass is not working, so this can affect Google Maps, GPS Test and Satnav apps. As I use this tablet exclusively for SatNav (with offline maps) it could be a dealbreaker.

Anyone getting compass to work on 8704F? It was OK on stock Android 8
[Thinkpad Tablet Android Development] dave457:
Does anyone know ow to get back to stock Android, either 7 or 8. I tried a few methods but nothing worked

Any ideas?

thanks
[Thinkpad Tablet Android Development] Lun4cy:
Use Lenovos LMSA Tool. But i think you shouldn't use the latest FW since it can have a WiFi Bug.
[Thinkpad Tablet Android Development] dave457:
and where may I get that from?

Have you used it?

I'm not bothered too much about wifi bug as most of the time the tablet is in my car without WiFi
[Thinkpad Tablet Android Development] pompyz:
Congrats... However, are DT2W and BT properly working after flashing ??
[Thinkpad Tablet Android Development] Lun4cy:
I just googled LSMA - first hit was the Lenovo Tool. And yes, i used it. Works like a charm, even if the Tab ist ****ed up and turned off.

DT2W no - but thats stated in the first post and i don't know about BT because i've no usecase for this Tab and BT. Just use it for playing and watching movies during travels :)
[Thinkpad Tablet Android Development] pompyz:
Any new update in this thread ???
[Thinkpad Tablet Android Development] dahawthorne:
No.
[Thinkpad Tablet Android Development] Pedros97:
Here is the last march 2021security patch update.