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 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: lxQt, black)
- 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: Make sure you backed up your data! |
Start with pmbootstrap init
Select your opinions but make sure device is samsung-goyavewifi
and DE is not wayland.
2.Run
pmbootstrap install
3.Device has an EMMC that is about 8GB. Installing onto EMMC is not recommended.
You need to export image file. (Because native sdcard flasher takes over 10 mins.)
5.run
pmbootstrap export
6. If you are going to install into the sdcard, image is located here:
~/.local/var/pmbootstrap/chroot_native/home/pmos/rootfs
7.execute
$ pmbootstrap flasher flash_kernel # in download mode!
8.Done!
For first boot: You need to wait atleast 3 or 5 minutes to lightdm fully appear. (lightdm is slow) 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. There may be something going wrong.
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 - 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
-
Leather back cover
-
The camera and "Samsung" text,scratches and damaged speaker
-
Its working at all
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
3D Acceleration
- Due to downstream kernel, lima doesnt work.
- Lima is needed for the Mali 400 graphics.
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
There are no boot screen or anything, how do I know whether device is booted or 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 microusb port is looking left.
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 - If you booted device in charging mode (battery icon with lightning) then the touchscreen dont work because in android,the device doesnt boot (in charging mode) so it doesnt need the touch screen.
- 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. - 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)