Samsung Galaxy Tab 3 Lite (samsung-goyavewifi)
This device runs a Downstream kernel. Some UIs will not work, and most features (3D acceleration, audio, etc.) may be broken. |
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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 MP2 |
Display | 600x1024 TFT |
Storage | 8 GB |
Memory | 1 GB |
Architecture | armv7 |
postmarketOS | |
Category | downstream |
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 |
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Kernel package |
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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
|
Internal storage eMMC, SD cards, UFS, ... |
Works
|
SD card Also includes other external storage cards |
Works
|
Battery Charging and battery level reporting works |
Works
|
Screen 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 Auto screen rotation works in desktops e.g. Phosh or Plasma Mobile |
Works
|
Contributors
Users owning this device
- Al3x
- AmateurPenguin (Notes: gud)
- 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: + + and press
- Recovery mode: + +
Installation
WARNING: Your device WILL BE ERASED if you decide to install into userdata partiton. |
WARNING: You may need to flash stock rom if the flashing fails. |
1.Run
pmbootstrap init
2.Select device codename as goyavewifi (do not confuse with goyawifi)
- You can select anything except anything runs wayland
3.Run
pmbootstrap install
4.If your images size larger than 1500 mb you cant install to system (pmbootstrap flasher flash_rootfs --partition userdata
doesnt work for no reason. but you can install with twrp or use a sdcard larger than 3gb for flawless experience)
You need to export image file and flash with heimdall.
5.run
pmbootstrap export
6.run
heimdall flash --userdata ~/.local/var/pmbootstrap/chroot_native/home/pmos/rootfs/samsung-goyavewifi.img
Note:sometimes heimdall can hang
7.run
pmbootstrap flasher flash_kernel
8.Done!
Now you can ssh into your device!
For first boot: You need to wait atleast 3 or 5 minutes to lightdm fully appear.
Notes: If your device doesnt show anything(just samsung galaxy tab 3 lite screen and nothing) try to ssh 172.16.42.1 if ssh throws error connection refused wait for 1~2 minutes.
Display
Display works.
- No gpu accel or drm, can only run x11.
- Due to a patch "sprd swapped colors patch", no splash when booting.(Without the patch, Xorg crashes, both probably because the display is 16bit).
- The error code of pbsplash is
tfb_acquire_fb() failed with error code: 7
.
- The error code of pbsplash is
- for any DE installation that uses lightdm (for example; xfce, mate), you need to 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
- lxqt ghosts on default theme and on some themes (only in taskbar) and notifications.
- a quick fix is changing themes.
- if you want to change the scale (in lxqt) add these to
/etc/environment
QT_SCALE_FACTOR=0.75 QT_AUTO_SCREEN_SCALE_FACTOR=0.75
You can change the numbers to increase or decrease the scale.
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
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
-
Leather back cover
Camera
- There is a video0 device.
sudo v4l2-ctl --stream-mmap --stream-count=1 --stream-to=raw.dat
finishes with VIDIOC_REQBUFS returned -1 (Not a tty)
I'll try with sudo script /dev/tty0
Performance
- Resource usages on goyavewifi when lxqt is running.
- This device can run firefox.
- You can use NetSurf.
- An example of netsurf showing this page.
Useful tips
About swaps
- You should enable swap for more ram and more performance.
You can make a swap file. Here is for a swap file sized 1024 MB;
~ $ dd if=/dev/zero of=/path/to/your/swapfile bs=256 count=4 # change path to your swapfile path (i recommend /system or /) ~ $ mkswap /path/to/your/swapfile # change the path ~ # swapon /path/to/your/swapfile # change the path ~ # nano /etc/fstab <add this line> /path/to/your/swapfile swap swap sw,nofail 0 0 /path/to/your/swapfile <end>
You can mount your sdcard
/home/user # mkdir /sdcard /home/user # mount /dev/mmcblk1p1 /sdcard
You can also use udisks2 and gvfs, but sometimes doesn't work. For NTFS, you need ntfs-3g
Making it permanent
- You can make mounting sdcard permanent;
/home/user # ash -c "echo 'sudo mount /dev/mmcblk1p1 /sdcard' > /etc/local.d/sdcard.start /home/user # chmod +x /etc/local.d/sdcard.start
You can mount system partitions:
/home/user # mkdir /system /home/user # mount /dev/mmcblk0p23 /system
The fdisk output are located here
FAQ
How to find that the device is in the initramfs stage?
Step 1. Turn on the device and immediately plug in to pc. Step 2. Wait for USB device to appear. Step 3. When USB device appears,the device is booting the initramfs.
Booting to initramfs is usually takes 5.3 seconds.
What is the difference between other models of Tab 3?
- The device (goyavewifi) SM-T113(NU) is Samsung Galaxy Tab 3 Lite 7.0 Value Edition
- The device (goyawifi) SM-T110 is Samsung Galaxy Tab 3 Lite 7.0
- The device (lt02) SM-T210 is Samsung Galaxy Tab 3 7.0
Input
HID buttons
- event0: sci-keypad
- home, power, volume keys
- you can check raw data from
/dev/input/event0
- you can check raw data from
- home, power, volume keys
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 - try a non-forceful reboot if it doesn't appear
- 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
Issues or Errors
- In any DE with polkit, sometimes an error occurs that policykit has crashed. so any apps with root/changing brightness will not work. It sometimes works, sometimes doesn't.
No matter what, in dock or app menu no apps are displayed. So don't use xfce.
- Using system as a swap partition is broken.After rebooting the system will fail to boot even if the system is installed to userdata or any other partition.
- Console or None selections on
pmbootstrap init
has display issues - You can install sxmo-de-dwm to system partition but there will not be any free space.
- Changing kernel cmdline doesnt work.
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.
Additional notes
- pmaports!3377 Initial merge request
- deviceinfohw.ru page for SM-T113NU
- pmaports#1883 Display and touchscreen have different orientations
- Similar device: Samsung Galaxy Tab E 7.0 / Galaxy Tab 3V Lite (samsung-goyave3g) (SM-T116)