Code:
#include "std_disclaimer.h"
/*
* Your warranty is now void.
*
* I am 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 this Recovery
* 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.
*/Requirements
- Unlocked bootloader
- working ADB/fastboot on a PC
- the TWRP image downloaded
- Pie firmware on the active slot
Installation guide (pre metadata encryption):
- Copy the twrp image to your phones storage and/or micro sdcard
- Start cmd/powershell/terminal with working adb/fastboot
- Reboot to bootloader
- adb reboot bootloader OR
- turn off the phone (or reboot), as soon as it turns on, hold volume down while USB cable is connected
- If youre unofficially bootloader unlocked, and you nuked laf, its volume up and USB for you
- fastboot boot TWRP-judypn-boot.img
- Confirm allow system modifications if asked
- Press cancel if asked for a password (aka when youre encrypted, could also be that it doesnt show you /data at all and no password screen)
- Go to Advanced -> Install Recovery Ramdisk
- Select the TWRP image which you copied to your phone/sdcard earlier
- TWRP will now be installed to both slots (boot_a and boot_b)
- Go to Reboot -> Recovery to make sure TWRP is successfully installed
Features:
- Install recovery ramdisk:
Selecting this, and then an image (e.g. of TWRP) allows you to install the ramdisk (where TWRP resides for example) into both currently installed kernels/boot images - Inject TWRP after install:
Automatically injects current installed TWRP into the boot image of the ROM/zip youre installing when ticked
Broken:
- LGs encryption on Stock
- encryption on other ROMs(?)
How to flash ROMs (PRE metadata encryption):
- Reboot to TWRP
- Make a backup
- Install -> select the ROM zip -> tick Inject TWRP -> Swipe for install
- wait... ROM will be installed into the NON ACTIVE slot (if youre on a, it will be installed to b, and vice versa)
- Reboot system
- DO NOT REBOOT TO SYSTEM from last step
- Go back -> Reboot -> select the non active slot (to where the rom got installed to) -> select recovery
- Install gapps, magisk, and whatever else you want
- Reboot system
How to initially flash ROMs (metadata encryption):
- Reboot to existing TWRP
- Make a backup of everything you want to keep
- Copy backup to PC (or another external medium)
- Flash the ROM
- Do NOT inject TWRP (this will break recovery otherwise)
- Go to reboot -> Select opposite slot
- Reboot to recovery
- Perform factory reset (this is to setup encryption)
- Apply update (from ADB) with adb sideload for gapps/magisk
- reboot to bootloader
- fastboot boot judypn_TWRP_bootable-metadata.img
- Use as usual
- Reboot system
How to update ROMs (metadata encryption):
- Reboot to bootloader
- fastboot boot judypn_TWRP_bootable-metadata.img
- Install -> Select ROM zip
- do NOT inject TWRP
- Reboot -> select opposite slot (it will tell you even which it installed the ROM to)
- Reboot bootloader
- fastboot boot judypn_TWRP_bootable-metadata.img
- Install gapps/magisk
- reboot recovery
- apply update -> from adb (in e.g. Lineage recovery)
- On PC: adb sideload <new version zip>
- (Advanced -> ) Reboot recovery
- adb sideload gapps/magisk
- reboot system
Warnings:
- Updating a ROM means reflashing the mods you flashed too (e.g. Gapps), addon.d doesnt work properly
- Be aware of the slot you are currently on
- If youre flashing a ROM to a slot, make sure you also have the required firmware (abl, modem, and so on) in that slot
Infos:
- System image/Vendor image and system/vendor are redundant, the image variants are direct copies of the partition (and also their size) while the others are "simply" files copied and repacked
- How to use decrypted stock by @Xsavi : https://forum.xda-developers.com/lg-v40/how-to/guide-twrp-data-access-stock-t3970149
- Metadata encryption TWRP requires 10 firmware to use properly, no guarantee for it to work on Pie firmware!
Download:
Metadata bootable: https://drive.google.com/file/d/1hdzeH3AIQVf3siQNsI27IS_vmghPESEG/view?usp=sharing + Install zip: https://drive.google.com/file/d/1CQUfg54zD838detcIJqdRiKXdVNtd6Iy/view?usp=sharing
Bootable: https://drive.google.com/open?id=1UnIFbJlXHl6x4azq6H6yS-PRfk-omdTP
Old: https://drive.google.com/open?id=1p3IrbeOxM4ay01JccyifWDuxqqrE0_Dl
Sources:
device tree: https://github.com/SGCMarkus/android_device_lge_judypn-twrp/tree/android-9.0
kernel: https://github.com/SGCMarkus/android_kernel_lge_sdm845/tree/lge-pie-v409-20a
XDA:DevDB Information
TWRP for Judypn, ROM for the LG V40
Contributors
SGCMarkus
ROM OS Version: 9.x Pie
Version Information
Status: Alpha
Created 2019-09-20
Last Updated 2019-09-20
Attachments
Last edited:
