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Samsung Galaxy Tab 3 Lite (samsung-goyavewifi)

From postmarketOS Wiki
This device has been archived. This means that it no longer appears in pmbootstrap and is likely broken.
It can still be selected in pmbootstrap init by typing in the vendor and codename, but you will have to build the kernel package manually.
Samsung Galaxy Tab 3 Lite
[[
Samsung-goyavewifi running LxQT with themes and fastfetch in a terminal.
Samsung-goyavewifi running LxQT
|200px|alt=]]
Manufacturer Samsung
Name Galaxy Tab 3 Lite
Codename samsung-goyavewifi
Model SM-T113(NU)
Released 2015
Type tablet
Hardware
Chipset Spreadtrum SC8830
CPU 4x 1.2 GHz Cortex-A7
GPU Mali-400 MP
Display 600x1024 TFT
Storage 8 GB
Memory 1 GB
Architecture armv7
postmarketOS
Category archived
Mainline
Instead of a Linux kernel fork, it is possible to run (Close to) Mainline.
 no
pmOS kernel
The kernel version that runs on the device's port.
 Linux 3.10.17 downstream
Unixbench score
Unixbench Whetstone/Dhrystone score. See Unixbench.
 486.0
Device package device-samsung-goyavewifi
Kernel package linux-samsung-goyavewifi
Features
Flashing
Whether 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
Internal storage
eMMC, SD cards, UFS...
Works
SD card
Also includes other external storage cards.
Works
Battery
Whether charging and battery level reporting work.
Works
Screen
Whether the display works; ideally with sleep mode and brightness control.
Partial
Touchscreen
Works
Multimedia
3D Acceleration
Broken
Audio
Audio playback, microphone, headset and buttons.
Partial
Camera
Broken
Connectivity
WiFi
Works
Bluetooth
Broken
GPS
Untested
Miscellaneous
FDE
Full disk encryption and unlocking with unl0kr.
Untested
USB OTG
USB On-The-Go or USB-C Role switching.
Works
Sensors
Accelerometer
Handles automatic screen rotation in many interfaces.
Works

Contributors

Users owning this device

  • Al3x
  • AmateurPenguin (Notes: Best pmOS experience)
  • Choc (Notes: running pmOS)
  • Ernk11323 (Notes: Running PostmarketOS)
  • HAKANKOKCU (Notes: Running PostmarketOS, have 2 which other has Lineage.)
  • Vicenre22 (Notes: i have 3 tablets (2 modded stock firmware and 1 for EDK2 porting with mainline))

How to enter flash mode

  • Download mode: Volume Down + Home + Power and press Volume Up
  • Recovery mode: Volume Up + Home + Power

Installation

Warning WARNING: Make sure you have backed up your data!

Mostly refer to installing using pmbootstrap
Just do not select SystemD ever (until someone ports mainline kernel) and do not select wayland based (such as GNOME,KDE,etc.)
KDE X11 will not work because of heavy usage.

For flashing just boot into download mode (How to enter flash mode) and flash the kernel and rootfs from there.

It did not had (and still doesnt have) a boot animation. How to check if its booting

For first boot:
You need to wait atleast 1 or 4 minutes to lightdm fully appear.

Notes:
If you think that it doesnt boot (Recently after switch to using losetup to mount rootfs broke many downstream devices such as S6 Edge (zeroltexx),S10+ (beyond2lte), and (maybe) many more. !7932) it may be slowness of the device, BUT if you flashed the rootfs and the kernel image correctly, and it drops you to the debug shell it may be that problem.

Display

Display works.

  • X11 Only.
  • Due to a patch "sprd swapped colors patch", no splash when booting.(Without the patch, Xorg crashes, both probably because the display is 16bit).
  • for any DE installation that uses lightdm (for example; xfce, mate),(not necessary) install postmarketos-base-downstream
  • blanks after inactivity, likely some power-saving feature
    • echo 0 > /sys/class/graphics/fb0/blank turns it back on
  • Suspending doesnt work. X fails with
FBDEV(0): FBIOPUT_VSCREENINFO: Invalid argument
FBDEV(0): mode initialization failed
Fatal server error: AddScreen/ScreenInit failed for driver 0

Audio

  • Needs soc-sprd-audio-sc8830 package
  • Headphones and back speaker works
  • Headset and Handset only gives microphone and it's low volume, but /usr/share/alsa/ucm2/conf.d/sprdphone/HiFi can be patched to fix both. Like this
  • Back speakers freak out when plugged to a thing.

PulseAudio

Need to add these lines at /etc/asound.conf: 

defaults.ctl.card 1
defaults.pcm.card 1
defaults.pcm.device 1

Also need to edit this line in /etc/pulse/default.pa: 

load-module module-udev-detect

To: 

load-module module-udev-detect tsched=0

WiFi

You can copy /system/etc/wifi from stock rom to the device, then wifi works.

Steps to fix wifi 1.Download wifi firmware below or extract yours from stock system image.

  • If you want to extract yours, you need to use an system unpacker.

2.SCP to your device and copy to the home folder of your device 

$ sudo scp ~/wifi/* # your user name@172.16.42.1:~/*
# then, in your device
$ sudo mkdir /system
$ sudo mkdir /system/etc
$ sudo mkdir /system/etc/wifi
$ sudo cp ~/* /system/etc/wifi
$ sudo reboot

Now wifi should work.

Added them here: HAKANKOKCU/firmware-samsung-goyavewifi

Couldn't get firmware-aosp-broadcom-wlan working.

Photos

Here are some photos of the device. Black:

  • Tablet in a stand
    Tablet in a stand
  • Leather back cover
    Leather back cover
  • The camera and "Samsung" text,scratches and damaged speaker
    The camera and "Samsung" text,scratches and damaged speaker
  • Tablet from 2015
    Tablet from 2015

Performance

  • Resource usages on goyavewifi when lxqt is running.

htop resource usages

  • This device can run firefox.
  • You can use NetSurf.
  • An example of netsurf showing this page.

netsurf

Partition table

The fdisk output are located here

How to check if its booting

1. Look at the screen at 65 degrees.
If screen suddenly changes color(white to green),then you are booting.
You can see the difference looking at 60 to 80 degrees.
Note: Make sure the Micro usb port is looking left.

Input

HID buttons

  • event0: sci-keypad
    • home, power, volume keys
      • you can check raw data from /dev/input/event0

Touchscreen

  • event1: MELFAS_MMS449_Touchscreen
    • in portrait
    • includes "Recents" and back buttons
    • stops working on suspend, cat /sys/class/input/event1/device/device/device_enable reenables it
    • If you booted device in charging mode (battery icon with lightning) touchscreen will be disabled.
  • Rotation fix: add this to /etc/X11/xorg.conf.d/00-fbdev-rotate-CCW.conf
Section "Device"
    Identifier "LCD"
    Driver "fbdev"
    Option "Rotate" "CCW"
EndSection
  • Note:this changes screens rotation to fix touch with rotation
  • Udev fix ( no rotation )
  • You can also add this at /etc/udev/rules.d/00-touchscreen-dev.rules:
SUBSYSTEM=="input", ATTRS{phys}=="1-0048/input0", ENV{LIBINPUT_CALIBRATION_MATRIX}="0 1 0 -1 0 1"

This needs a full reboot.

Headset

  • event2: headset-keyboard
    • works

Accelerometer

  • event3: accelerometer_sensor (STM K2HH)

Have to do this to get it working: 

~ # echo 0 > /sys/class/input/event3/device/poll_delay
~ # echo 1 > /sys/class/input/event3/device/enable

You can confirm it working with evtest

UART

This device can log UART with 619K (or 680K) resistor. 151K wouldn't log almost any S-Boot logs but OS exec'ed with kexec would still log.

To get S-Boot logs, put 619K resistor between ID and GND. While it's powering on, hold home button to get logs. This seems permanent in my device but shouldn't really affect normal usage. Just logs more stuff if you have CONFIG_FRAMEBUFFER_CONSOLE on.

For some reason, sdcard doesn't want to work while UART is active with micro usb.

Uart

Additional notes

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