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Samsung Galaxy S4 (samsung-jflte)

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Revision as of 16:48, 29 January 2019 by GrantM11235 (talk | contribs) (Change arch to armv7)
Samsung Galaxy S4
Galaxy S4
Galaxy S4
Manufacturer Samsung
Name Galaxy S4
Codename samsung-jflte
Released 2013
Hardware
Chipset Qualcomm APQ8064AB Snapdragon 600
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
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


Contributors

Maintainer(s)

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
  • 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 --no-fde
  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):

$ sudo su -
# wpa_passphrase $YOUR_SSID > /etc/wpa_supplicant/wlan0.conf
<enter passphrase here and press Enter>
# exit

Connect to network using wpa_supplicant:

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

If your network uses DHCP, start the DHCP client:

$ sudo udhcpc -i wlan0

Photos

Links