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[ROM][UNOFFICIAL][8.1.0][TB-X704F] LineageOS 15.1 for Lenovo Tab4 10 Plus

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Senior Member
Jan 29, 2011
You still need to remove asserts? I added support for a, so it should work normally.

I use this one because whenever I try the ones on this thread or the newer thread I get a Too Many Links error after trying to boot with fastboot. Trying to flash with fastboot gave a black screen until the rom reverted back to the stock recovery because its script. When trying to flash lineage I could not get it to flash because I think whoever built this TWRP configured their device differently so the device check fails.


Dec 18, 2012

Can anyone tell me how to root my x704a ?
And is it possible for x704a to have a Los rom?

Aloha acidsweet,
Were you able to find Root instructions and a ROM for your TB-X704A? I also have a Lenovo TB-X704A and trying to find Root instructions and a ROM for it. I have spent a few hours scouring these threads for a solution but am a bit consfused. I would really appreciate hearing back from you.


New member
Jun 15, 2019
Tab 4 "8" plus compatibility

Hey. I have a Lenovo tab 4 8 plus (tb-8704x). I was wondering if this ROM is compatible for my tablet as there is no custom ROM for this device and the stock ROM is boring. I guess both are have the same specs.
Thanks in advance:good:
BTW your ROM is epic

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     * 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 8.1 (Oreo), 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:
    Camera (partly)

    Camera (autofocus & hdr)
    Hall sensor
    Selinux Enforcing

    Source code:
    device: https://github.com/yener90/android_device_lenovo_TBX704
    kernel: https://github.com/yener90/android_kernel_lenovo_msm8953
    vendor: https://github.com/yener90/android_vendor_lenovo_TBX704

    If you are using this ROM first time, wipe data. Wipe data completely. I mean the option where you need to enter "yes". Use this option and then flash the rom.
    This ROM only works with the TWRP I added.

    If you want to use GAPPS, flash it directly after flashing ROM. Don't let the ROM boot. Otherwise your device will not get certification, so you will not have Google Access.

    Instructions (thx @matshias, just changed few lines to get ROM flashing working)

    1. Put your ROM (and GApps) onto your sdcard (sdcard must be exfat or fat32, NTFS not supported)
    2. Install fastboot and adb on your PC, e.g. from here
    3. Enable developer options and in there select to unlock your bootloader by enabling OEM unlock and enable USB debugging
    4. Connect your PC to your tablet and run
      adb reboot bootloader
      using adb on command line. The tablet will reboot into bootloader mode where you will only see the Lenovo logo. Now you use
      fastboot oem unlock-go
      to unlock. This will factory reset your device
    5. Don't setup, cause you will need to format your tablet later again. Shutdown tablet. Hold volume up and power button to start to bootloader
    6. Then run
      fastboot flash recovery twrp-3.2.3-0-<your-filename>.img
      to flash TWRP
    7. Select with volume buttons "Recovery Mode" and press power button
    8. Select to write to system, otherwise you can't flash ROM
    9. Backup at least system and boot partitions to your sdcard cause you will wipe data in next step. Choose "System Image" for the system partition backup.
    10. Format data using this tutorial
    11. Flash ROM
    12. Optionally flash SuperSU or Magisk in TWRP which should install system less. Keep OEM unlock enabled if you flash or modify anything
    13. Restart

    • changes to fingerprint
    • changes to sdcard (careful those who are using sd card as internal)
    • security updates: 2019-04-05
    • updated TB-X704L fix file for fingerprint support
    TB-X704L fix

    Older downloads

    • partly fixed camera (autofocus & hdr dont work), use Open Camera
    • some debugging features disabled, should improve performance

    • fixed fingerprint
    • first attemps fixing camera (will take longer than expected...)

    • intital release

    Optional downloads
    Dolby Digital Plus (use the TWRP one)
    GAPPS (use 8.1 arm64; I suggest using pico variant)

    @highwaystar_ru (he gave me the important hint, also used his sources and his thread :eek:)
    @LumenReaper (for his work with CM14.1, where I took big part of his device tree :fingers-crossed:)
    @Flowah123 for the TB-X704L files :fingers-crossed:

    For donations you can click here
    Thanks to @rorzer, @Preyer11, @Tschumi, @MrMagic, @max_work & 5 x anonymous :D

    Please don't support Lenovo and buy their tablets
    [I]Updates vary depending on the model where our tablets receive Android and security updates after the introduction. 
    We announced Tab 4 10 Plus in February 2017 and since then it has received seven OTA updates. 
    However, this model has reached the end of its update cycle and will not receive any more updates in the future.
    - Lenovo (2018-05-11)[/I]
    Just seven updates and not even one major upgrade, please don't support them.

    Reporting bugs
    Please tell what mods you are using and what tablet variant (TB-X704F or L or ABCDEFGH..)
    If your tablet doesnt start:
    go to TWRP. use file manager, go to sys/fs/pstore, copy the files and upload it here.
    if your tablet starts and bug appears later:
    go to TWRP. use file manager, go to sys/fs/pstore, copy the files
    start your tablet normal, let the bug appear, enter adb root
    use adb logcat and adb shell dmesg, copy the content to a text file and upload here

    XDA:DevDB Information
    [ROM][UNOFFICIAL][8.1.0][TB-X704F] LineageOS 15.1 for Lenovo Tab4 10 Plus, ROM for the Lenovo Thinkpad Tablet

    ROM OS Version: 8.x Oreo

    Version Information
    Status: Testing

    Created 2019-03-27
    Last Updated 2019-05-13
    @rorzer i will add a link :eek:

    Good news guys, last important function is fixed:
    Camera works now :fingers-crossed:
    i wish i could help you ;)

    like to have getprop from my L Model ?

    Need a lil bit more time.

    Great dev @highwaystar_ru ported Pie to Tab3, so now I am also working on it :eek:
    The system itself runs very well. Also TWRP is very nice in landscape.

    Maybe some notes after a short test phase, because your post is not so detailed yet.

    - Encryption (forceencrypt is enabled)
    - Clearly better audio quality than in Lineage 14.1 (Yener has already made me aware of my mistake)
    - Significantly newer kernel (3.18.115 instead of 3.18.31)

    - Hall sensor
    - selinux (for completeness only)

    All in all very good rom. Thank you Yener!