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Samsung Galaxy Grand Max (samsung-grandmax)

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Note This page is about the dedicated port of this device. There is also an optional generic port available for this device - see Generic MSM8909 (qcom-msm8909).
Samsung Galaxy Grand Max
Phosh
Phosh
Manufacturer Samsung
Name Galaxy Grand Max
Codename samsung-grandmax
Released 2015
Type handset
Hardware
Chipset Qualcomm Snapdragon 410 (MSM8916)
CPU 4x 1.2 GHz Cortex-A53
GPU Adreno 306
Display 720 x 1280
Storage 16 GB
Memory 1.5 GB
Architecture armv7
Software
Original software Android
Original version
The version the device was shipped with.
4.4
Extended version
The most recent supported version from the manufacturer.
5.1.1
postmarketOS
Category community
Pre-built images
Whether pre-built images are available here.
yes
pmOS kernel
The kernel version that runs on the device's port.
Mainline
Unixbench score
Unixbench Whetstone/Dhrystone score. See Unixbench.
1084.5
Optional Generic Port Generic MSM8909 (qcom-msm8909)
Features
Flashing
It is possible to flash the device with pmbootstrap flasher.
Works
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
Works
Screen
Display works. Ideally with sleep mode and brightness control.
Works
Touchscreen
Works
Multimedia
3D Acceleration
Works
Audio
Audio playback, microphone, headset and buttons.
Works
Camera
Broken
Connectivity
WiFi
Works
Bluetooth
Works
GPS
Untested
Modem
Calls
Works
SMS
Works
Mobile data
Works
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Works
USB OTG
USB On-The-Go or USB-C Role switching
Works
Sensors
Accelerometer
Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile
Partial
Ambient Light
Broken
Proximity
Broken

Users owning this device


Architecture

Note Note: Even though MSM8916 is capable of aarch64, the firmware of some variants were never updated with aarch64 support. Therefore, this device can only boot mainline on armv7 at the moment.

Variants

Model Codename Architecture Supported lk2nd
SM-G7200 grandmaxltezc armv7 ? ?
SM-G7202 grandmax3gdd aarch64 ? ?
SM-G720AX grandmaxlteub armv7 Y Y
SM-G720N0 grandmaxltekx armv7 ? ?

Installation

lk2nd is a secondary bootloader that provides a standard fastboot interface, which can be used to boot postmarketOS without Android boot flashed or pmbootstrap flasher flash_kernel.

  1. Download lk2nd-msm8916.img from Releases page on Github.
  2. Boot your phone to bootloader (Odin/Download) mode by holding Volume Down and Home while powering up.
  3. Follow lk2nd instructions to install lk2nd. Basically flash it to the boot partition (heimdall flash --BOOT lk2nd-msm8916.img)
  4. Follow Qualcomm_Snapdragon_410/412_(MSM8916)#Installation to install postmarketOS.
Note Note: Enter lk2nd fastboot mode by pressing only Volume Down + Power (without Home). Pressing Home additionally will bring you to the Samsung Download mode.

Audio

Warning WARNING: The speakers are rather loud on 100% volume and may produce distorted sound that may damage your speakers after long use. Please make sure to use reasonable volumes - your ears and your speaker will thank you!

LEDs

The LEDs on the touchkey are gpio-leds, which can be controlled by subsystem leds and udev rules.

More information on LEDs handling can be found at: LEDs.

Battery

Actually a sec-fuelgauge with rt5033-battery driver.

Flash LED

Currently WIP. It can be controlled with SG Micro SGM3140 charge pump LED driver[1].

Accelerometer

lis2hh12 accelerometer is not so stable for auto screen rotation, which suggests you to use fixed portrait or landscape mode.

Ambient Light/Proximity Sensor

The driver for cm36686 ambient light/proximity sensor is not available.

See also

References