Samsung Galaxy A2 Core (samsung-a2corelte)
 A2 Core running Phosh | |
| Manufacturer | Samsung |
|---|---|
| Name | Galaxy A2 Core |
| Codename | samsung-a2corelte |
| Released | 2019 |
| Type | handset |
| Hardware | |
| Chipset | Samsung Exynos 7870 Octa |
| CPU | Octa-core 1.6 GHz Cortex-A53 |
| GPU | Mali-T830 MP1 |
| Display | 540 x 960 PLS IPS |
| Storage | 8/16 GB |
| Memory | 1 GB |
| Architecture | aarch64 |
| Software | |
| Original software | Android (Go) |
| Original version | 8.0 |
| postmarketOS | |
| Category | testing |
| Pre-built images | no |
| Mainline | yes |
| Unixbench Whet/Dhry score | 1304.5 |
| Flashing |
Works |
|---|---|
| USB Networking |
Works |
| Internal storage |
Works |
| SD card |
Works |
| Battery |
Partial |
| Screen |
Partial |
| Touchscreen |
Works |
| Multimedia | |
| 3D Acceleration |
Works |
| Audio |
Broken |
| Camera |
Broken |
| Camera Flash |
Broken |
| Connectivity | |
| WiFi |
Works |
| Bluetooth |
Works |
| GPS |
Broken |
| Modem | |
| Calls |
Broken |
| SMS |
Broken |
| Mobile data |
Broken |
| Miscellaneous | |
| FDE | |
| USB OTG | |
| Sensors | |
| Accelerometer |
Works |
| Ambient Light |
Works |
| Proximity |
Works |
| Haptics |
Works |
Samsung Galaxy A2 Core is an entry-level Exynos 7870 device released by Samsung in 2019.
Contributors
- naproxen
Users owning this device
- Naproxen (Notes: Mainlining Subject)
How to enter flash mode
When the phone is powered off, insert the USB cable while holding the Volume Up and Volume Down buttons to boot into download mode. A turquoise colored screen will appear, asking for confirmation. Press Volume Up to confirm. Your device is ready for flashing via a front-end such as Odin or Heimdall.
To boot into recovery, hold the Power and Volume Up buttons.
Installation
Prerequisites
Make sure your phone:
- Has its bootloader unlocked.
Preparation
Choose the following in the pmbootstrap init wizard:
Vendor: samsung Device codename: a2corelte
To proceed with the installation run:
$ pmbootstrap install
This will begin preparing your installation in your host computer.
Flashing
After the installation process is completed, get your phone booted into download mode, Then run:
$ pmbootstrap flasher flash_kernel
The kernel gets flashed to your device. Now, the device will reboot automatically. Hold the key combination to reboot into download mode. Then run:
$ pmbootstrap flasher flash_rootfs
The rootfs is flashed and the device gets rebooted. It should reboot to postmarketOS now.
 |
If there are any problems with flashing the rootfs via Heimdall, you may attempt an installation via recovery. |
Partial features
Battery
The fuelgauge driver (reports the charge percentage) works fine, but there's no charger driver which is responsible for reporting charge status and control.
Screen
Display works with simple-framebuffer, so brightness control is non-functional. Samsung DECON/DSIM driver for Exynos 7870 is a work-in-progress, which will properly initialize and use the display.
Problems
USB Networking
At least on some operating systems, the host doesn't receive network packets from the device, unless the host sends packets to the device. Due to this behavior, SSH (among other things) doesn't work well. A workaround is to have ping -Aq <IP> run in the background while you interact with the device (replace <IP> with the device IP address).
Wi-Fi
Wi-Fi behaves very erratically (practically unusable) when the SDIO is probed in DMA mode. The driver fails to communicate with the SDIO, reporting timeout errors. As a workaround, the SDIO is forced to be probed in PIO mode.
Debugging (retrieving kernel logs)
Read this.
See also
pmaports!4981 Initial merge request