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Samsung Galaxy Tab A 8.0 (2019) (samsung-gtowifi): Difference between revisions

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== Problems ==
* LightDM won't start until you disable <code>logind-check-graphical</code> in <code>/etc/lightdm/lightdm.conf</code>. (see [https://wiki.postmarketos.org/wiki/Display_manager#CanGraphical_issue #CanGraphical_issue])
* <code>nm-applet</code> doesn't create connection profiles properly. You have to use <code>nm-cli</code> to connect to a new network for the first time.
* Battery capacity doesn't update.


== How to enter flash mode ==
== How to enter flash mode ==
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* Wipe System and Data partitions.</br>
* Wipe System and Data partitions.</br>
* Flash <code>boot.img</code> to Boot.</br>
* Flash <code>boot.img</code> to Boot.</br>
* Go to Advanced > Terminal and run <code>dd if=samsung-gtowifi.img of=/dev/block/mmcblk0p69</code> and be patient. Make sure you adapt the input file to wherever you copied it to. <b>Do not misspell the output file, or you will overwrite another partition and possibly brick the device.</b></br>
* Go to Advanced > Terminal and run <code>dd if=samsung-gtowifi.img of=/dev/block/mmcblk0p69</code> and be patient. Make sure you adapt the input file to wherever you copied it to.</br>
* Reboot. TWRP will warn you saying "No OS is installed!", you can ignore this.
* Reboot. TWRP will warn you saying "No OS is installed!", you can ignore this.


== Notes ==
<code>/dev/block/mmcblk0p69</code> is the data partition, do not misspell this when installing or you may brick your device.
If you are using LightDM and the desktop doesn't start (splash screen simply freezes after 2-4 minutes of loading), [https://wiki.postmarketos.org/wiki/Display_manager#CanGraphical_issue disable logind-check-graphical in the LightDM configuration]
 
<code>nm-applet</code> doesn't create connection profiles properly. You have to use <code>nm-cli</code> whenever you connect to a new network for the first time


== See also ==
== See also ==

Revision as of 17:05, 22 September 2023

Samsung Galaxy Tab A 8.0 (2019)
Manufacturer Samsung
Name Galaxy Tab A 8.0 (2019)
Codename samsung-gtowifi
Released 2019
Type tablet
Hardware
Chipset Qualcomm Snapdragon 429 (MSM8937)
CPU Quad-core 2.0 GHz Cortex-A53
GPU Adreno 504
Display 800x1280
Storage 32GB
Memory 2GB
Architecture aarch64
Software
Original software Android
Original version 9
postmarketOS
Category testing
Pre-built images no
Features
Flashing
Broken
USB Networking
Works
Internal storage
No data
SD card
No data
Battery
Partial
Screen
Works
Touchscreen
Works
Multimedia
3D Acceleration
No data
Audio
Broken
Camera
Broken
Camera Flash
No data
Connectivity
WiFi
Works
Bluetooth
Broken
GPS
No data
Miscellaneous
FDE
No data
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

  • Irihapeti
  • Oatm22

Users owning this device


Problems

  • LightDM won't start until you disable logind-check-graphical in /etc/lightdm/lightdm.conf. (see #CanGraphical_issue)
  • nm-applet doesn't create connection profiles properly. You have to use nm-cli to connect to a new network for the first time.
  • Battery capacity doesn't update.

How to enter flash mode

Plug USB micro to USB A cable into computer. With tablet turned OFF, press and hold vol. up and vol. down simultaneously, and plug USB micro end of cable into tablet. Release buttons when screen turns on.

Press vol. up to go to download mode.

Installation

Note This assumes you have installed TWRP.
You cannot use custom firmware if you have updated to stock firmware newer than T290XXU3CVG3. See the disclaimer here

Run pmbootstrap install, then pmbootstrap export.
Transfer the exported files to the device using your preferred method. (e.g. microSD, USB OTG, adb push)

Start TWRP and do the following

  • Wipe System and Data partitions.
  • Flash boot.img to Boot.
  • Go to Advanced > Terminal and run dd if=samsung-gtowifi.img of=/dev/block/mmcblk0p69 and be patient. Make sure you adapt the input file to wherever you copied it to.
  • Reboot. TWRP will warn you saying "No OS is installed!", you can ignore this.

/dev/block/mmcblk0p69 is the data partition, do not misspell this when installing or you may brick your device.

See also