[Thinkpad Tablet Android Development] highwaystar_ru:
/*
* 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-16.0-msm8937

kernel: https://github.com/lenovo-devs/android_kernel_lenovo_msm8953/tree/lineage-16.0-tb8504

vendor: https://github.com/lenovo-devs/proprietary_vendor_lenovo/tree/lineage-16.0-msm8937

2020-03-19

Fixed USB flash mounting when using OTG

mailru: lineage-16.0-20200319-UNOFFICIAL-TB8504.zip

gdrive: lineage-16.0-20200319-UNOFFICIAL-TB8504.zip

Previous versions:

2020-03-13

Fixed graphical issues

Fixed USB modem mode

Selinux now enforcing

mailru: lineage-16.0-20200313-UNOFFICIAL-TB8504.zip

gdrive: lineage-16.0-20200313-UNOFFICIAL-TB8504.zip

2020-03-04

first release

mailru: lineage-16.0-20200304-UNOFFICIAL-TB8504.zip

gdrive: lineage-16.0-20200304-UNOFFICIAL-TB8504.zip

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][9.0][tb8504f/x] LineageOS 16.0 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-16.0-tb8504

ROM OS Version: 9.x Pie

ROM Kernel: Linux 3.10.x

Based On: LineageOs

Version Information

Status: Testing

Created 2020-03-04

Last Updated 2020-03-19