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LG V500 (lg-v500)

From postmarketOS Wiki
LG G Pad 8.3
Manufacturer LG
Name G Pad 8.3
Codename lg-v500
Released 2013
Type tablet
Hardware
Chipset Qualcomm Snapdragon 600 (APQ8064T)
CPU 4x 1.7 GHz Krait 300
GPU Adreno 320
Display 1200x1920 (~273 PPI) IPS LCD
Storage 16 GB
Memory 2 GB
Architecture armv7
Software
Original software
The software and version the device was shipped with.
Android 4.2.2
Extended version
The most recent supported version from the manufacturer.
Android
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
no
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Untested
USB Networking
After connecting the device with USB to your PC, you can connect to it via telnet (initramfs) or SSH (booted system).
Works
Battery
Charging and battery level reporting works
Untested
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Works
Multimedia
3D Acceleration
Untested
Audio
Audio playback, microphone, headset and buttons.
Untested
Camera
Untested
Connectivity
WiFi
Untested
Bluetooth
Untested
GPS
Untested
Modem
Calls
Untested
SMS
Untested
Mobile data
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Untested


Contributors

  • Thomasdhale

Maintainer(s)

  • Thomasdhale

What works

Downstream kernel compile, Telnet iniramfs works to fix a partition issue (pmboostrap install selects wrong partition UUID), then process freeze later.

What does not work

How to enter flash mode

Factory reset/enter recovery

LG default recovery can be entered thanks to `adb reboot recovery`. Those step can be used to go into a custom recovery like TWRP !

Warning WARNING: Please make sure you have a custom recovery like TWRP, otherwise it will format all the data
  1. Push and maintain `power` and `volume down` buttons
  2. When LG bootscreen appears release the buttons
  3. Push `power`, `volume up` and `volume down` buttons
  4. The screen should display "Factory hard reset", release the buttons
  5. There are two confirmation, press power twice to confirm
  6. Custom recovery will launch

Download mode

This mode can be used with "LG mobile support tool" in order to restore factory software. It seems to be proprietary protocol

  1. Shut down the tablet, disconnect USB cable
  2. Push and maintain `volume up` button
  3. Connect to the computer
  4. Release the volume button
  5. The screen should display "Download mode" in a white square, the blacklight seems to be at minimum so it might be difficult to read in bright light


boot.img signature

While boot.img are not really signed, a magic word needs to be appended to it for the device to boot without complaining about "Secure booting error".

Someone kindly created a tool called Open Bump to easily add this magic word the bootloader is looking for. An updated Python 3 version is available from here, then it is as easy as:

  1. Executing `./open_bump.py boot.img`
  2. Flashing the resulting `boot_bumped.img` to the phone thanks to `dd` or TWRP install image feature.

Installation

Users owning this device


See also