[Lenovo Vibe K5 Plus ROMs, Kernels, Recoveries, & O] Shreps:
LineageOS is a free, community built, aftermarket firmware distribution of Android 8.0 (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. You can also view the Changelog for a full list of changes & features.

Device infos:

http://wiki.lineageos.org/devices/A6020/

What's working :

Boots

Wifi

RIL (Call, SMS, MMS, Data/LTE)

Bluetooth

Camera Photo and Camcorder (video recorder via Footej Application)

Video Playback

Audio ( Recording and Playback )

GPS

Sensors

WiFi/USB Tethering

What's not working :

SELinux is permissive

Video Playback (hardware acceleration)

Audio (Stereo Playback is a little buggy) (should be fixed)

DRM

Encryption

VoLTE

Flashlight might be not well synchronized

Maybe more ROM specific bugs

Instructions :

Requires TWRP 3.1.1 Oreo (or newer) - Official TWRP 3.2+ should be good

At first install, wipe cache and data and system

Install ROM

Install Open GApps arm64 (please use right version, according if you're using 8.0 or 8.1)

ReBoot

When you're updating from a previous Lineage 15.x version:

Install ROM update

Wipe cache and Dalvik

ReBoot

Downloads :

Builds : https://moto.shreps.fr/?dir=Lenovo Vibe K5 (A6020)/ROM/Lineage/Oreo

Gapps: (zip available on my website)

Reporting Bugs

DO NOT Report bugs if you're running a custom kernel or you installed Xposed

Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)

If it is a random reboot, grab /proc/last_kmsg. (Do not bother getting a logcat unless you can get it just before the reboot. A logcat after a reboot is useless)

If the problem disappears after running "setenforce 0" from a root shell, grab /data/misc/audit/audit.log

Bug report should be done in following format provided in code below

What is your
LineageOS version:
LineageOS Download url:
Gapps version:

Did you
wipe:
restored with titanium backup:
reboot after having the issue:

Are you using--
a task killer:
a non-stock kernel:
other modifications:

Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed:

Extra thanks & Contributors to this dev:

[MENTION=6294867]subha785[/MENTION]

[MENTION=6998569]Harry8242[/MENTION]

XDA:DevDB Information

[ROM][UNOFFICIAL][8.1] LineageOS 15.1 for the Lenovo K5/K5 Plus, ROM for the Lenovo Vibe K5 Plus

Contributors

Shreps, scritch007

Source Code: https://github.com/boulzordev/android_device_lenovo_A6020

ROM OS Version: 8.x Oreo

ROM Kernel: Linux 3.10.x

ROM Firmware Required: TWRP Recovery

Based On: LineageOS

Version Information

Status: Beta

Created 2017-09-17

Last Updated 2018-01-04