Samsung Galaxy S4 (samsung-jflte)

From postmarketOS
Jump to: navigation, search
Samsung Galaxy S4
Galaxy S4
Galaxy S4
Manufacturer Samsung
Name Galaxy S4
Codename samsung-jflte
Released 2013
Original software Android 4.2.2 (Jelly Bean)
Hardware
Chipset Qualcomm APQ8064T Snapdragon 600
CPU Quad-core 1.9 GHz Krait 300
GPU Adreno 320
Display 1920x1080 AMOLED
Storage Internal storage and external micro SD
Memory 2G ram
Architecture armhf
Features
USB Networking
Works
Flashing
Touchscreen
Works
Display
Works
WiFi
Works
Xwayland
FDE
Mainline
Battery
3D Acceleration
Accelerometer
Audio
Bluetooth
Camera
GPS
Mobile data
SMS
Calls



Contributors

  • i9505_someone (rrooij on GitHub)

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

What does not work

  • Touch screen requires a reboot to work in some rare cases
  • 3D acceleration
  • Wayland default on screen keyboard
  • Initramfs password entry for full disk encryption

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. 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

I9505 libreoffice xfce.jpg

Links