Introduction
Warning!
Before you begin
Installation
Adding ROMs
Using USB drive
Updating/changing ROMs
Source code
Credits
@Tasssadar for the original work on MultiROM
@dr87 for letting me use his device tree and his kernel and helping out with some things
@savoca for his loki scripts
@arcardinal
@reas0n for testing
and everyone else I forgot
Donations
MultiROM is one-of-a-kind multi-boot mod for LG G2. It can boot any Android ROM. Besides booting from device's internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. The main part of MultiROM is a boot manager, which appears every time your device starts and lets you choose ROM to boot. You can see how it looks on the left image below and in gallery. ROMs are installed and managed via modified TWRP recovery. You can use standard ZIP files to install secondary Android ROMs and MultiROM even has its own installer system, which can be used to ship other Linux-based systems.
Features:
* Multiboot any number of Android ROMs
* Restore nandroid backup as secondary ROM
* Boot from USB drive attached via OTG cable
You can also watch a video which shows it in action.
Warning!
It _is_ dangerous. This whole thing is basically one giant hack - none of these systems are made with multibooting in mind. It is no longer messing with data partition or boot sector, but it is possible that something goes wrong and you will have to flash factory images again. Make backups. Always.
Before you begin
This is in alpha stage. If you have the D805/6 model, use the recovery for D802. This should work on both LGD and JDI panels, but you may get some glitches. I'm working on a panel detection script which will be included in the next versions of recoveries.
Also, some ROM combinations don't work properly. You will get stuck on lg logo or MultiROM error message. It's because of the locked bootloader! It won't load the secondary ROM's kernel. We have to wait until there is a way to unlock it.
Installation
Firstly, there are videos on youtube. If you want, just search for "MultiROM installation" on youtube and watch those, big thanks to all who made them. There is also an awesome article on Linux Journal.
Note 1: Your device must not be encrypted (hint: if you don't know what it is, then it is not encrypted).
MultiROM has 3 parts you need to install:
You current rom will not be erased by the installation.
- MultiROM (multirom-YYYYMMDD-v28-UNOFFICIAL-G2.zip) - download the ZIP file from second post and flash it in recovery.
- Modified recovery (TWRP_multirom_codename_YYYYMMDD.img) - download the ZIP file from second post and flash it in recovery.
- Patched kernel - You can use either one of the stock ones in second post or third-party kernels which include the patch, you can see list in the second post. Download the ZIP file and flash it in recovery.
Download links are in the second post.
Adding ROMs
Android
Go to recovery, select Advanced -> MultiROM -> Add ROM. Select the ROM's zip file and confirm.
Using USB drive
During installation, recovery lets you select install location. Plug in the USB drive, wait a while and press "refresh" so that it shows partitions on the USB drive. You just select the location (extX, NTFS and FAT32 partitions are supported) and proceed with the installation.
If you wanna use other than default FAT32 partition, just format it in PC. If you don't know how/don't know where to find out how, you probably should not try installing MultiROM.
If you are installing to NTFS or FAT32 partition, recovery asks you to set image size for all the partitions - this cannot be easilly changed afterward, so choose carefully. FAT32 is limited to maximum of 4095MB per image - it is limitation of the filesystem, I can do nothing about that.
Installation to USB drives takes a bit longer, because the flash drive is (usually) slower and it needs to create the images, so installation of Ubuntu to 4Gb image on my pretty fast USB drive takes about 20 minutes.
Enumerating USB drive can take a while in MultiROM menu, so when you press the "USB" button in MultiROM, wait a while (max. 30-45s) until it searches the USB drive. It does it by itself, no need to press something, just wait.
Updating/changing ROMs
1. Primary ROM (Internal)
- Flash ROM's ZIP file as usual, do factory reset if needed (it won't erase secondary ROMs)
- Go to Advanced -> MultiROM in recovery and do Inject curr. boot sector.
2. Secondary Android ROMs
If you want to change the ROM, delete it and add new one. To update ROM, follow these steps:
- Go to Advanced -> MultiROM -> List ROMs and select the ROM you want to update.
- Select "Flash ZIP" and flash ROM's ZIP file.
Source code
MultiROM - https://github.com/PatrikKT/multirom-g2
Modified TWRP - https://github.com/PatrikKT/Team-Win-Recovery-Project
g2-common device tree - https://github.com/PatrikKT/device_lge_g2-common
Credits
@Tasssadar for the original work on MultiROM
@dr87 for letting me use his device tree and his kernel and helping out with some things
@savoca for his loki scripts
@arcardinal
@reas0n for testing
and everyone else I forgot
Donations
This thread was used as a templateAll this stuff would not be possible without the original work of Tasssadar. If you like his work, consider sparing him a few bucks on paypal or Bitcoins, his address is 172RccLB2ffSnJyYwjYbUD3Nx4QX3R8Ris
And as of me, I don't want any donations. I do all of this for free. Just press that thanks button![]()
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