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Samsung Galaxy S4 (samsung-jflte)

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Revision as of 22:20, 11 November 2022 by S0p0st (talk | contribs) (Hardware / sensors detail: add hwtest results (jfltespr))
Samsung Galaxy S4
Galaxy S4
Galaxy S4
Manufacturer Samsung
Name Galaxy S4
Codename samsung-jflte
Released 2013
Hardware
Chipset [[Qualcomm Snapdragon 600 APQ8064AB]]
CPU Quad-core 1.9 GHz Krait 300
GPU Adreno 320
Display 1080x1920 AMOLED
Storage Internal storage and external micro SD
Memory 2G ram
Architecture armv7
Software
Original software Android 4.2.2 (Jelly Bean)
postmarketOS
Category testing
Pre-built images no
Unixbench Whet/Dhry score 717.1
Features
Flashing
Works
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
Works
Screen
Works
Touchscreen
Works
Multimedia
3D Acceleration
No data
Audio
No data
Camera
No data
Camera Flash
No data
Connectivity
WiFi
Works
Bluetooth
No data
GPS
No data
NFC
No data
Modem
Calls
No data
SMS
No data
Mobile data
No data
Miscellaneous
FDE
Works
USB OTG
No data
HDMI/DP
No data
Sensors
Accelerometer
No data
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data

Supported models

This page is only for versions of the Galaxy S4 that use the Qualcomm Snapdragon 600 SoC, see https://en.wikipedia.org/wiki/Samsung_Galaxy_S4#Model_variants

Watch out, some versions have bootloaders that can't be unlocked, although the locked versions have a bootloader that contains a bug.

Contributors

Maintainer(s)

Users owning this device


What works

  • Compiling the latest lineageos kernel with some patches applied
  • Booting a graphical screen when installing PostmarketOS as recovery zip in TWRP.
  • Network connection via USB and SSH access
  • Screen works
  • Brightness can be changed by echoing a value to /sys/class/backlight/panel/device/backlight as root
  • Wifi with properietary blobs
  • Touch screen
  • Wayland
  • X11
  • Keyboard and mouse with USB OTG adapter (Hotplug works)
  • Initramfs password entry for full disk encryption

What does not work

  • Touch screen requires a reboot to work in some rare cases
  • 3D acceleration
  • Wayland default on screen keyboard

How to enter flash mode

Press volume down + the power button to enter Download Mode. It is now possible to use Heimdall for flashing.

Installation

  1. Install pmbootstrap
  2. pmbootstrap init
  3. pmbootstrap install
  4. Put your S4 in Download Mode (Volume Down + Power) and connect it with USB
  5. pmbootstrap flasher flash_kernel
  6. After the kernel is flashed, the device will reboot. Hold the volume down button while it boots up to re-enter Download Mode
  7. pmbootstrap flasher flash_rootfs

Wifi

Once the device has been successfully initialized, enable it:

$ sudo ip link set wlan0 up

Configure wpa_supplicant (only necessary on encrypted networks):

$ wpa_passphrase $YOUR_SSID | sudo tee /etc/wpa_supplicant/wlan0.conf
<enter passphrase here and press Enter>

Connect to network using wpa_supplicant:

$ sudo wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wlan0.conf 

If your network uses DHCP, start the DHCP client:

$ sudo udhcpc -i wlan0

Hardware / sensors detail

Output from hwtest on jfltespr sph-l720t:

hwtest output (jfltespr)

For reference, sensor information from sensors sandbox (f-droid) on jfltespr sph-l720t; note that in addition to hardware-based sensors, it presumably includes software-based / derived sensors:

sensor details (sensorssandbox)

Photos

Links