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[ROM][UNOFFICIAL][10.0][tb8704f/x/v] LineageOS 17.1 for Lenovo TAB 4 8 plus

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ashu.droid

Member
Jun 29, 2018
21
2
Can someone share me build.prop file for TB8704X version

---------- Post added at 05:29 PM ---------- Previous post was at 05:25 PM ----------

I get very poor speed when connected to 2.4ghz wifi on TB8704x but on other android devices i get it well. Please if anyone could solve this issue
 

ChaosBlades

Member
Apr 6, 2012
41
6
TB-8704V
Build 2020-06-01

Bluetooth crashes and will not start
Double Tap to Wake does not work

So far other than the Bluetooth issue everything is running really smoothly. I see multiple people reporting BT doesn't work yet it says it does in OP and those people never get any replies. So is this user error or not? It doesn't seem like it. My install isn't dirty and BT worked on Lineageos 16.0.
 

rafamg

Member
Feb 8, 2011
8
0
Would this work for the 8804F ROW version? Has anybody tried it?
I have TWRP 3.2.1 and is currently rooted.
Kernel 3.18.31
Android 7.1.1

Thanks in advance!
 

jfbaudio

Senior Member
Mar 21, 2012
54
9
TB-8704V
Build 2020-06-01

Bluetooth crashes and will not start
Double Tap to Wake does not work

So far other than the Bluetooth issue everything is running really smoothly. I see multiple people reporting BT doesn't work yet it says it does in OP and those people never get any replies. So is this user error or not? It doesn't seem like it. My install isn't dirty and BT worked on Lineageos 16.0.

I also have a 95% smooth experience. I do have occasional freezes followed by a non-critical bootloop (just interrupting it with a long-press power and restarting the device fixes it). I didn't have this problem with LOS 16 but so far it's rare enough that it doesn't bother me
 

bql94040

New member
Sep 2, 2020
1
0
TB-8704f
Build 2020-06-01

I think I have read all the posts, and saw that many have successfully installed the 2020-06-01 build. I use TWRP
1. Reformat data, and adv wipe of the Dalvik/Art Cache, System, Data and Cache.
2. adb push the linage build to the sdcard
3. Then flash successfully
4. Wipe the cache, then reboot.

But I can't seem to get mine to go beyond the initial booting logo. Not sure what I missed.

Can anyone suggest what I should try?

thanks.
 

Ecthelion3

Senior Member
Jun 17, 2014
100
24
TB-8704f
Build 2020-06-01

I think I have read all the posts, and saw that many have successfully installed the 2020-06-01 build. I use TWRP
1. Reformat data, and adv wipe of the Dalvik/Art Cache, System, Data and Cache.
2. adb push the linage build to the sdcard
3. Then flash successfully
4. Wipe the cache, then reboot.

But I can't seem to get mine to go beyond the initial booting logo. Not sure what I missed.

Can anyone suggest what I should try?

thanks.
Some TWRP versions have the problem that they don't reliably format data. lancebuks created a TWRP version for the Tab 4 8 plus that fixes this problem. Unless you are sure you are already using this version you could search this thread for a link to lancebuks' TWRP version, install it and then try again.
 

gzdc

Senior Member
Oct 1, 2016
154
18
Bug Report

Hello DEV i was trying to play some games (PUBG mostly) and i realized that moultitouch didn't work. Did anyone else faced this problem? With other custom roms there wasn't any problem. Thanks in advance...
 

highwaystar_ru

Senior Member
Sep 17, 2016
342
2,355
Lineage 17.1 update
2020-09-06
  • Update Lineage code
  • Fixed FM radio issue
  • Fixed issues on 8704F (wifi only version), when charger cable unplugged (please report if it really works this time, I dont have wifi only tablet to test)
 

WiteWulf

Senior Member
Mar 31, 2020
50
17
Lineage 17.1 update
2020-09-06
  • Update Lineage code
  • Fixed FM radio issue
  • Fixed issues on 8704F (wifi only version), when charger cable unplugged (please report if it really works this time, I dont have wifi only tablet to test)

Thanks @highwaystar_ru, my first install on my TB8704F was a dirty flash of just the image and an updated GApps. I wiped cache and dalvik after install and rebooted but got stuck either on the Lenovo boot logo or went into Recovery

I rebooted into recovery (Lancebuks's 3.4.0-0 for TB8704F), wiped dalvik, cache and system then reinstalled LOS, GApps and Magisk. I did another wipe of dalvik and cache after install, just to be sure, then rebooted into the updated LOS okay.

Camera, WiFi and Bluetooth appear to be working fine and the device happily reboots disconnected from a PC or power source.

*edit* Should be obvious, but I also had to redo the device fingerprint as per https://forum.xda-developers.com/showpost.php?p=81681043&postcount=32

NB. the fingerprint list has been updated since Lancebuks's original post, so don't just press the keys listed in his guide as the indexes have changed. Read the list and make sure you're selecting the right options.
 
Last edited:

venom04

Member
Jun 29, 2007
49
19
Bad Hersfeld
Hi, can someone provide me the stock recovery? I have no power and can't boot the tablet but it's not possible to charge my tablet in twrp! Thanks in advance

---------------------

Found recovery, thank you
 
Last edited:

WiteWulf

Senior Member
Mar 31, 2020
50
17
I don't even understand the question. I've just rebooted on battery, no charging connection, without problems. I have never had any reboot problems with this ROM. Maybe others have battery or improper installation problems?

They were referring to a problem a significant number of users (myself included at one point) had at point, in that the device would only boot successfully if connected to a power source or computer. With no USB power source the device would go into a boot loop, getting as far as the LOS logo then rebooting.
 

Eisbaer2

Member
Jun 10, 2016
24
1
Lineage 17.1 update
2020-09-06
  • Update Lineage code
  • Fixed FM radio issue
  • Fixed issues on 8704F (wifi only version), when charger cable unplugged (please report if it really works this time, I dont have wifi only tablet to test)

I installed that version. My tablet (8704F) runs very smooth. I only have two problems (so far ;):

1) Huge battery drain (>>10% within 12 hours waiting in standby, even in extreme power save mode)
2) Often the tablet doesn't connect to my saved WIFI network, even though I see it in the network list. I have to manually choose to connect to my network...

Update after a few days more testing:
The battery drain has gone. I also had several reboots with following bootloop. After disabling the extreme power saver mode the tablet is stable and I have no more sudden reboots. Great :)
The connect to my WIFI also seems to be faster :)

Unfortunately the tablet doesn't wake up when I open my tablet case with magnet lock.

@highwaystar_ru: thank you for the LOS versions
@lancebuks: thank you for TWRP 3.4.0.0
 
Last edited:

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  • 1
    How did you install this? I was able to install the 2020 just fine, but tried to install the latest from Pedro and it just sits endlessly.

    I'm definitely a n00b and took a stock android 8 tab 4 8 plus

    I fastboot into twrp and then click install and then select the 2021 download from the post above and swipe and it just sits. I'm not sure what's wrong


    Recap, I installed the 2020 version of 17.1 from page 1 of this thread, now I wanted to utilize Pedro's link that includes the security fixes, but I can't get it to install, but maybe I'm doing it wrong, but seem to be stuck on the same screen as oldleaf.
    I forgot the exact procedure to upgrade to lineage-17.1-20210617-UNOFFICIAL-TB8704.zip. But I have just successfully upgrade from 20210617 to 20210820.

    Here are the steps:
    1) power off the tablet, Vol-Up + Power to boot the recovery screen.
    2) factory default and boot to bootloader
    3) with USB cable connected, run
    fastboot boot twrp-3.2.3-0-tb_8704x.img
    4) in TWRP, "advanced" -> "fix contexts"
    5) back to main screen, wipe data
    6) back to main screen, install lineage-17.1-20210820-UNOFFICIAL-TB8704.zip from SDcard
    7) back to the last screen, install BiTGApps and reboot
  • 22
    http%3A%2F%2Ffiles.paulfasola.fr%2FCyanogenMod%2FLineageOS.png


    Code:
    /*
     * I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...). 
     * Please do some research if you have any concerns about features included in the products you find here before flashing it! 
     * YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you. 
     * Your warranty will be void if you tamper with any part of your device / software.
     * Same statement for XDA.
     */

    LineageOS is a free, community built, aftermarket firmware distribution of Android 10, which is designed to increase performance and reliability over stock Android for your device.

    LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.

    All the source code for LineageOS is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit out Gerrit Code Review.


    What works:
    Calls/SMS/Mobile data
    Wifi
    Bluetooth
    GPS
    Camera
    Audio
    FM radio
    Torchlight
    USB and WLAN tethering

    Broken
    DT2W
    You tell me

    Source code:
    device : https://github.com/lenovo-devs/android_device_lenovo_TB8704
    device tb-comon https://github.com/lenovo-devs/android_device_lenovo_tb-common
    kernel: https://github.com/lenovo-devs/android_kernel_lenovo_msm8953
    vendor: https://github.com/lenovo-devs/proprietary_vendor_lenovo

    2020-09-06
    • Update Lineage code
    • Fixed FM radio issue
    • Fixed issues on 8704F (wifi only version), when charger cable unplugged (please report if it really works this time, I dont have wifi only tablet to test)
    mailru: lineage-17.1-20200906-UNOFFICIAL-TB8704.zip
    gdrive: lineage-17.1-20200906-UNOFFICIAL-TB8704.zip
    boot.img for TB-8704V: boot-los17.1-tb8704v-20200531.img (source code)

    Previous versions:


    How to install
    You have to had TWRP installed from this thread TWRP and ROOT for Tab 4 8/10 (Plus) (TB-8704X/F/V,TB-X704L/F, TB-8504X/F, TB-X304L/F)

    In TWRP clean Data if you coming from stock ROM and do Install of this ROM. If you have android 8 stock rom installed you have to format Data with data loss, because used encryption is incompatible with android 7.1

    TB-8704V (Verizon)
    If you have TB-8704V tablet, you have to additionaly flash boot.img from link above after rom intsallation. This tablet has some hardware differences from x and f and requires custom kernel to work,

    Thanks
    Big thank to @mistersixt, who donated $$ for device.


    XDA:DevDB Information
    [ROM][UNOFFICIAL][10.0][tb8704f/x/v] LineageOS 17.1 for Lenovo TAB 4 8 plus, ROM for the Lenovo Thinkpad Tablet

    Contributors
    highwaystar_ru
    Source Code: https://github.com/lenovo-devs/android_kernel_lenovo_msm8953

    ROM OS Version: Android 10
    ROM Kernel: Linux 3.10.x
    Based On: LineageOs

    Version Information
    Status: Testing

    Created 2020-05-31
    Last Updated 2020-05-31
    11
    TWRP 3.4.0-0

    In case anyone is interested I updated TWRP to 3.4.0-0

    I can confirm that it works on the TB-8704X and hopefully it's work on the F and V as well.

    https://forum.xda-developers.com/showpost.php?p=81627509&postcount=2031
    10
    Here is the last june 2021security patch update.
    Finally patch serious security vulnerability in Qualcomm MSM, the vulnerability CVE number is CVE-2020-11292.

    10
    lineage-17.1-20200725-UNOFFICIAL-TB8704

    Hi, I compiled a new build which contains audio.deep_buffer.media=false

    https://mega.nz/folder/0ZV2SSbC#HjNloMp7OsJpB93H_zdIMw

    Source Code:
    Github
    9
    lineage-17.1-20200713-UNOFFICIAL-TB8704

    Hi, latest build available with the July security patch.

    All I did was sync the repo and build - the latest patch was added by the LOS team.

    Dirty flash and clean flash was fine and everything seems to be working.

    Download lineage-17.1-20200713-UNOFFICIAL-TB8704.zip

    I can only test this on my TB-8704X so hopefully it'll work with the with the F and V variants as well.

    Flash my TWRP as it's been updated with the latest TB-8704 kernel.