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

superdragonpt · Oct 28, 2019

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 into external (or internal) storage
5 - Full Wipes ( recommended, wipe All -Preflash)
6- Flash Rom & Gapps (gapps are OPTIONAL)
After ROM is finished flashing, there will be a prompt for
To fix "SU"
--> press "NO", otherwise it'll mess some permissions and wifi (among other things) won't work properly

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 2020-04-27

superdragonpt · Oct 28, 2019

FAQ & Changelogs / Downloads

Small FAQ:

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

Q: After locking the screen, the screen is all black, and I'm forced to reboot, how can I fix this?
A: If you have this issue, then your device uses an different hardware LCM
( the lgld070wx3_dsi_vdo ), please use the second kernel.zip for this variant, it'll be added an second kernel . zip for people with this variant, on the download section with the ROM releases
how to flash this ?
After flashing the ROM, flash the second kernel afterwards
This kernel containing the LCM for this HW variant will be always WIP, as both my units have the first LCM HW variant ( nt35521_dsi_vdo).
So my testing will be always based on other people logs

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

Build: 20191103

Build: 20200413

Build: 20200516

Kernel:

Upstream to Linux 3.4.34
LCM: nt35521_dsi_vdo: Be compatible with the newer Hynix nand
mmc: Hynix HAG2E: Work around sdio resume
Power: Turn off VMC 3V For power saving
WiFi: Adjust regs for better WiFi Power flow (Decreases WiFi Power consuption)
mediatek: remove MTK SCHED
WiFi: Final corrections (Fully working now)
Sound corrections
video: Improve on-resume responsiveness
LCM: lgld070wx3_dsi_vdo Is fully working now
Other small issues & clean up fixs

Frameworks:

native: libUi : Add compatibility with MediaTek MT6589
native: surfaceflinger: Add compatibility with MediaTek MT6589
EGL: Add further compatibility with MediaTek MT6589
av: libstagefright: WIP MT6589 Fixs
Better integration of MTK MT6589 hwcomposer (forward port code from MediaTek MT6589 KK BSP)
Better integration of MTK MT6589 gralloc (forward port code from MediaTek MT6589 KK BSP)

Downloads:

Recovery:
https://www.androidfilehost.com/?fid=4349826312261609065

Download Builds:

20191028

20191103

20200413

20200516

https://www.androidfilehost.com/?fid=4349826312261811603

Kernel build 20200516 (for second LCM HW variant)
(check F.A.Q. above for more info )
https://www.androidfilehost.com/?fid=4349826312261811606

..

superdragonpt · Oct 28, 2019

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), this is broken at kernel level, let alone on ROM...
- Sensors ( accelerometer & magnetometer are still kinda broken, they are registered, but don't work most of the times)

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) FIXED since Build 20200516

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

Working:

LCM nt35521_dsi_vdo
LCM lgld070wx3_dsi_vdo
(second HW revision), support available in an seperate kernel .zip
( check F.A.Q above)

Touch (GT927)
Charging (BQ24156)
Storages
All the rest

GPL:

Kernel:
https://github.com/dragonpt/android_kernel_asus_me173x

New Kernel starting from 20200413 builds
https://github.com/dragonpt/android_kernel_asus_me173x_new

Device:
https://github.com/dragonpt/android_device_asus_me173x

Rortiz2 · Oct 29, 2019

Oh god. This looks amazing!
Dang that I sold mine a few years ago...
Good work!

tweakradje · Oct 29, 2019

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.

superdragonpt · Oct 29, 2019

tweakradje said:
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

taller_stk · Oct 30, 2019

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

superdragonpt · Oct 30, 2019

taller_stk said:
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...sus/mediatek/config/asus/ProjectConfig.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

taller_stk · Oct 30, 2019

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

Trubbs · Oct 30, 2019

superdragonpt said:
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?

superdragonpt · Oct 30, 2019

Trubbs said:
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/details?id=ru.andr7e.deviceinfohw&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:

dt_matthews · Oct 30, 2019

What are people using for root on this? I've tried flashing Magisk (v20) but it fails in an unsupported image format when extracting the boot image.

superdragonpt · Oct 31, 2019

dt_matthews said:
What are people using for root on this? I've tried flashing Magisk (v20) but it fails in an unsupported image format when extracting the boot image.

Lineage have their own su, you can activate it on developer settings
- you can also flash latest SuperSu 2.82 (tested working)
-Magisk haves some issues with some Mediatek devices (some other mtk devices my team supports haves this issue as well)
If I recall ... only until version 14 or 16 works
( I'll confirm this later)

Cheers

con01 · Oct 31, 2019

I have graphic artifacts after waking up the device. in addition, tablet charging does not work. after uploading the re-stock ROM loading works

Wysłane z mojego motorola one vision przy użyciu Tapatalka

superdragonpt · Oct 31, 2019

con01 said:
I have graphic artifacts after waking up the device. in addition, tablet charging does not work. after uploading the re-stock ROM loading works

Wysłane z mojego motorola one vision przy użyciu Tapatalka

Really Weird charging is not working...
Working fine for me, (16 GB variant WW) also a user with the 16GB variant RU also confirmed this to be working

About after waking up the device I have this sometimes as well, its ESD discharge from the LCM, not something to worry about, the LCM is not perfect, needs some more tuning .

Could you tell me what LCM does your variant uses?
You just need to install an app and check .

Seems to me , there's some more model variants
( with slightly different hardware that I was aware )

Cheers

dt_matthews · Oct 31, 2019

superdragonpt said:
Lineage have their own su, you can activate it on developer settings
- you can also flash latest SuperSu 2.82 (tested working)
-Magisk haves some issues with some Mediatek devices (some other mtk devices my team supports haves this issue as well)
If I recall ... only until version 14 or 16 works
( I'll confirm this later)

Cheers

Ah, great, ok, I'll activate the provided su in settings.

altis07 · Oct 31, 2019

WOW!

Thank you, mate, for a great job!
It was pity to realise the good device is gonna die on JB.
Looking forward for a reliable ROM.

Rortiz2 · Oct 31, 2019

@superdragonpt sorry for became a bit OT,
Can I use some commits from your tree for another mt6589 device that I working on it?
Thanks!

superdragonpt · Oct 31, 2019

Rortiz2 said:
@superdragonpt sorry for became a bit OT,
Can I use some commits from your tree for another mt6589 device that I working on it?
Thanks!

Of course

Cheers

Trubbs · Nov 2, 2019

Installed rom without issue, good instructions :good:

I also get problems waking device, in fact always have to reboot. Main reason to install was to allow netflix downloads however it appears that is a deeper issue than just android version, possibly architecture. But it does allow install of kodi so positive there. Main use is entertainment device in my car during lunch break.

Also have weird keyboard issues, double key entry type android get androoid and random other key presses miles away from where my fat fingers are pressing.

Great work so far otherwise, thanks

Let me know if I can assist dev with any test or info.

Cheers

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

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