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[ROM] [UNOFFICIAL] LineageOS 12.1 |ASUS Memo Pad HD 7 (me173x) [MT8125]

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Disclaimer:
LineageOS (Lineage Android Distribution) members or anyone else on this website is not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. 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 us for messing up your device, we will laugh at you. Your warranty will be void if you tamper with any part of your device / software.





How to Install:
1- BACKUP, BACKUP, BACKUP, All will be WIPED!
2 - Unlock bootloader instructions here
3 - Flash New Recovery (with newer kernel for Lollipop)
4 - Move Rom & Gapps (optional) into external storage
5 - Full Wipes
6- Flash Rom & Gapps (OPTIONAL)



for GAPPS:

Choose Gapps Package "ARM" > "5.1" > "Pico" or "Nano" visit OpenGAPPS




Working:
  • Boots
  • Wifi
  • Bluetooth
  • GPS
  • Audio ( all: Speaker and headphones)
  • Charging and Offline Charging
  • Mediaserver
  • SW enc/dec
  • Both storages working
  • HW Composer
  • etc ....




NOT Working:
  • No camera support (broken in my kernel, and likely broken in Lineage as well)
  • Auto rotation (accelerometer broken in my kernel)
  • You tell me


Thanks
  • OMNI Rom and their work on MT6589 (special thanks to: xplodwild & Dr-Shadow)
  • chrmhoffmann
  • kashifmin & blackrebel75
  • DerTeufel1980 & fire855 ( my Team mates from M.A.D) some of our "madOS" optimizations where used here / other stuff


  • BSydz for Carliv-CWM Recovery ( im too lazy to build one)
    recovery has been repacked with my kernel for lollipop flash)




XDA:DevDB Information
[ROM] [UNOFFICIAL] LineageOS 12.1 |ASUS Memo Pad HD 7 (me173x) [MT8125], ROM for the Android General

Contributors
superdragonpt
ROM OS Version: 5.1.x Lollipop
ROM Kernel: Linux 3.4.x
ROM Firmware Required: Unlock Bootloader
Based On: CyanogenMod/LineageOS

Version Information
Status: Beta

Created 2019-10-28
Last Updated 2019-11-03
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29th October 2019, 12:34 AM |#2  
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FAQ & Changelogs / Downloads
Small FAQ:


Q: How can i Unlock the Bootloader?
A:
Instructions for Unlocking the Bootloader can be found here

Q: Where are the Developer Options?
A: Go to Settings>About Phone, and tap 7 times on the Build Number

Q: How can i root this rom?
A: Rom is already pre-rooted with Lineage's su
--> Enable Developer Options by tapping 7 times on Build Number
then in Developer Options > Check the "root access" option

Q: Can i root with another method ?
A: Sure, you can also use latest SuperSU (v 2.82)
Magisk root, haves some issues with Legacy MediaTek Devices, use/ test at your own risk

Q: I can't flash this Rom on recovery, why?
A: You need to update your recovery in order to flash this Lollipop Builds

Q: How can i flash the new recovery?
A: If you already have an custom recovery installed:

Download the new recovery zip
flash the new recovery
reboot to recovery again

If you don't have any custom recovery installed:
- You can extract the "recovery.img" from the .zip
- Open an terminal
- Boot to fastboot mode, and type:

Code:
fastboot flash recovery recovery.img
then reboot:
Code:
fastboot reboot
Q: I Love your work, how can i thank you?
A: You can press the "Thanks" button, and if you wish, you can pay me a beer



Changelogs:

Build: 20191028
  • First Release
  • build.id=LMY49J
  • version.release=5.1.1
  • Security_patch=2016-11-01



Build: 20191103
  • GPU PowerVR SGX 544: Update driver & DDK update from 2204701 > 2564405
  • LCM: nt35521_dsi_vdo: Improved Gamma / color
  • cpufreq & HotPlug Mechanism Backport from MTK KitKat
  • Reverted ASMP
  • Charger: BQ24156: Corrections: in some scenarios (thermal) current was too low to init charging
  • LCM: nt35521_dsi_vdo: More reverse engineering done ( greatly improved resume, suspend, etc)
  • Other Kernel optimizations, check github for full list
  • Fixed and enabled HWC (hardware composer)
  • ART: improvements for low ram devices
  • Many low ram optimizations
  • Frameworks: tune for Faster app switching
  • Frameworks: tune System Animations for low ram
  • Frameworks: tune Scrolling, velocitytracker, other system animations




Downloads:

Recovery:
https://www.androidfilehost.com/?fid...26312261609065

Builds:

20191028
https://www.androidfilehost.com/?fid...26312261609061

20191103
https://www.androidfilehost.com/?fid...26312261615659




..
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29th October 2019, 12:34 AM |#3  
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Info and GPL Compliance
Some small intro:

Asus never complied with GPL (despite the efforts of many people, myself included)
Asus always denied to provide the *real kernel source code, instead they provided an generic kernel that is useless, as it doesn't contained ANY driver used by this device


My Kernel, was made from *scratch, and this took some years to achieve the current state, yet, it's not completed nor perfect:


Broken:

- No cameras support ( the image sensors are highly customized by Asus)
- Sensors ( accelerometer & magnetometer are still kinda broken, they are registered, but don't work most of the times)
- LCM : "lgld070wx3_dsi_vdo"
no support for now, since both of my tablets don't own this hardware, can't diagnose , I'll need the help from someone that owns one of these


half Broken:

- WiFi : WiFi driver has also been highly customized, right now WiFi is working just fine, but with just one small bug
--> if you disconnect WiFi, and then afterwards try to connect it'll hang ( you need to reboot)

Reported battery percentage, isn't very precise , and may have sudden drops


Working:

LCM nt35521_dsi_vdo
Touch (GT927)
Charging (BQ24156)
Storages
Added exFAT support & many others optimizations (check github)

All the rest ...
GPL:

Kernel:

https://github.com/dragonpt/android_kernel_asus_me173x


Device:
https://github.com/dragonpt/android_device_asus_me173x
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29th October 2019, 09:28 PM |#5  
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Thanks for your efforts to make this working. Great job!
Still have one lying around here so definetly gonna try this.

If remaining problems with CM12.x are solved will there be like CM14 in the future too?

Thanks.
30th October 2019, 12:58 AM |#6  
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Quote:
Originally Posted by tweakradje

Thanks for your efforts to make this working. Great job!
Still have one lying around here so definetly gonna try this.

If remaining problems with CM12.x are solved will there be like CM14 in the future too?

Thanks.

Funny you asked this
There's some early work already towards los 14
( Nougat)

Let's see
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30th October 2019, 11:38 AM |#7  
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Thanks for work!
Yesterday I install this version on my tablet. Good side: tablet booted But after screen lock, I only can see screen backlight and sounds when I tap to a black screen, reboot helped solve this problem, but after screen lock, this problem repeated. And I can't turn on wifi
30th October 2019, 12:47 PM |#8  
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Quote:
Originally Posted by taller_stk

Thanks for work!
Yesterday I install this version on my tablet. Good side: tablet booted But after screen lock, I only can see screen backlight and sounds when I tap to a black screen, reboot helped solve this problem, but after screen lock, this problem repeated. And I can't turn on wifi

Interesting...
As I mentioned previously, this tablet came with two versions of LCM, I own two and both have the same :
"nt35521_dsi_vdo"
I can only assume your have the other LCM variant from LG "lgld070wx3_dsi_vdo"

As you can see here in kernel project configuration:

https://github.com/dragonpt/android_...tConfig.mk#L49

Thanks for your provided feedback, you gave me an clue in how to possibly fix this second LCM variant, I'll look into it.

Meanwhile if you please: before your tablet went into locking, where the colors alright, any noticeable artifacts in the screen?

Thanks
30th October 2019, 01:51 PM |#9  
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Yep, I see some artifacts on the screen: screen blink and white line on the bottom of the screen

JFYI, I have RUS tablet version
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30th October 2019, 09:39 PM |#10  
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Quote:
Originally Posted by superdragonpt

Interesting...
As I mentioned previously, this tablet came with two versions of LCM, I own two and both have the same :
"nt35521_dsi_vdo"
I can only assume your have the other LCM variant from LG "lgld070wx3_dsi_vdo"

Hi, is there a method from stock to determine that LCM version?
30th October 2019, 09:54 PM |#11  
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Quote:
Originally Posted by Trubbs

Hi, is there a method from stock to determine that LCM version?


yes


If you have stock rom (or any of my AOSP roms)


you need root, install deviceinfohw app



https://play.google.com/store/apps/d...nfohw&hl=en_US



then on this app go to settings, allow root permissions


reload the app, and it'll show the LCM driver






edit check picture:



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