Onn Tablet Gen 3 (onn-kelvin)

From postmarketOS
Icon WARNING: This device cannot run postmarketOS, as its architecture is unsupported.
Onn Tablet Gen 3
A screenshot of a rooted 7" Onn Tablet Gen 3 running termux
A screenshot of a rooted 7" Onn Tablet Gen 3 running termux
Manufacturer Onn
Name Tablet Gen 3
Codename onn-kelvin
Released 2022
Category testing
Original software Android (Go)
Original version 11
postmarketOS kernel 4.14.186 [note 2]
Hardware
Chipset MediaTek MT8168
CPU Arm-Cortex A53 MPCore [1]
GPU Arm Mali-G52 MC1 [1]
Display 7" 1024x600 LCD [note 3]
Storage 32GB
Memory 2GB
Architecture ARMv7
Type tablet
Unixbench Whet/Dhry score 0.0
This device is marked as not booting.
Status: The boot.img doesn't work, and I currently don't have UART access.
Features
USB Networking
Flashing
Touchscreen
Display
WiFi
FDE
Mainline
Battery
3D Acceleration
Audio
Bluetooth
Camera
GPS
Mobile data
Internal storage
SMS
Calls
USB OTG
NFC
Sensors
Accelerometer
Magnetometer
Ambient Light
Proximity
Hall Effect
Barometer
Power Sensor
Misc
Built-in DVB
Camera Flash
Keyboard
Touchpad
USB-A
HDMI/DP
Ir TX
Ir RX
Stylus
Memory Card
Haptics
Ethernet
FOSS bootloader


The Onn Tablet Gen 3 is a low-end (The 7" model is only $50) android tablet by Walmart with decent hardware.

It currently cannot boot into the postmarketOS initramfs.

This port is part of the lowendlibre project.

Contributors

hexaheximal

Users owning this device

How to enter flash mode

To use mtkclient, hold down the power button until it shuts off. It should then enter preloader mode within a few seconds.

For fastboot, hold down Volume Up + Power while the device is off and then select the fastboot option. You can also use adb reboot fastboot.

Installation

Use pmbootstrap to build your own installation image.

$ pmbootstrap init
$ pmbootstrap install --fde

You can then use mtkclient to flash the boot.img:

$ pmbootstrap export
$ mtk w boot /tmp/postmarketOS-export/boot.img


Notes

  1. The CPU itself is 64-bit, but the stock android build is 32-bit. It might be possible to boot 64-bit postmarketOS with u-boot, however that has not been tested yet.
  2. This is actually a pre-built kernel, as Walmart has not provided the kernel source tree as of writing this.
  3. There are multiple models of the Onn Tablet Gen 3 with different screen sizes and colors, but the hardware is the same.

References