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[ROM][UNOFFICIAL][10.0][tb8504f/x] LineageOS 17.1 for Lenovo TAB4 8

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Hausemaster

Senior Member
Dec 2, 2020
312
68
I thought I would chime in regarding the booting/bootloop issues. After spending hours rescuing, wiping and remounting /system, the unit just would NOT boot (either in 16.x or 17.x), I finally got it to boot doing the following:

1. Download and use the LATEST TWRP 3.3.1-1 as directed from this thread! The kernel and coding within this version did the trick, as I was still using an older version of TWRP (3.2.3-x) that I found for this device from another thread.
2. Power on the device into Fastboot (Hold VolUp + Power)
3. Flash TWRP (fastboot flash recovery twrp-3.3.1-1-TB8504.img)
4. Boot into TWRP--the touch screen may not be responsive--I simply pressed Power to turn off the screen, then pressed Power again--this allowed me to swipe and unlock the screen as well. If this doesn't work, try this a few more times--or use the mouse option as others mentioned.
5. MOUNT /system, /data, /cache
6. WIPE /data and format as needed
7. Reboot back into TWRP so that you can see your newly-formatted /data partition.
8. MOUNT /system, /data. and /cache again (do not mount as Read-Only)
9. Now go ahead and flash your ROM, GApps, etc--then Wipe Dalvik/Cache.
10. Reboot and you should now be able to boot. The process should take no more than 2-5 minutes tops.

*NOTE* For users inquiring about the TB8704v (Tab 4 PLUS), the same applies, PLUS you must also patch your boot image after flashing the ROM (boot-los17.1-tb8704v-xxx.img).

Good Luck!
The twrp link recommended for this rom is in the post made by the Dev initially, but, either way, this info will be helpful for new members...
 

real_v007

New member
Sep 14, 2021
2
0
bro please help me 4g is not working in this linger 17.1 but working in 16 i was upgrade this to 17 but when ever i tried to change to LTE (recommended) it automatically shifts to 3G what can i do ? help me
 

mrskellington

Member
Jul 31, 2017
14
0
Beauiful. Fan-tas-tic. I cannot thank you enough for putting the effort to create this ROM. Everything I tested works fine, so no complaints. I was absolutely tired of the stock ROM stuck in the past with not even dark mode available. Now my tablet works faster, apps run smoother, I can use it in dark mode, and it even seems to charge faster and keep its charge for longer.

Thanks man. Truly.
 

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    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 9 (pie), 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
    WLAN and USB tethering
    Broken
    You tell me

    Source code:
    device : https://github.com/lenovo-devs/android_device_lenovo_TB8504, https://github.com/lenovo-devs/android_device_lenovo_tb-common/tree/lineage-17.1-msm8937
    kernel: https://github.com/lenovo-devs/android_kernel_lenovo_msm8953/tree/lineage-17.1-tbx304
    vendor: https://github.com/lenovo-devs/proprietary_vendor_lenovo/tree/lineage-17.1-msm8937

    2021-04-08
    • Initial release
    mailru: lineage-17.1-20210408-UNOFFICIAL-TB8504.zip
    gdrive: lineage-17.1-20210408-UNOFFICIAL-TB8504.zip

    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 or one from link below

    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

    TWRP
    Built from omnirom android 9.0 source (twrp 3.3.1), includes same kernel as Lineage build, with support for pstore (kernel logs after crash), exfat, ntfs, reboot to EDL mode.
    mailru: twrp-3.3.1-1-TB8504.img
    gdrive: twrp-3.3.1-1-TB8504.img

    XDA:DevDB Information
    [ROM][UNOFFICIAL][10.0][tb8504f/x] LineageOS 17.1 for Lenovo TAB4 8, ROM for the Lenovo Thinkpad Tablet

    Contributors
    highwaystar_ru
    Source Code: https://github.com/lenovo-devs/android_kernel_lenovo_msm8953/tree/lineage-17.1-tbx304

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

    Version Information
    Status: Testing
    1
    good day ! TB-8504x bluetooth los 17.1 does not work. los 16.0 works. 🙏🏻
    Same here... I think it depends on the firmware because it works for some people. I think I had Bluetooth working in this ROM a few weeks ago, but then I reflashed Oreo firmware and it stopped working.