How To Guide Install GSI ROM - Xiaoxin Pad Pro 2021 [TB-J716F]

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luizkun

Member
Jan 20, 2020
40
4
hye xda-er,

after flashing several gsi's (pixel experience a11/12 and octavi os),
i found out that geekbench score is a bit worse than the stock rom,
i attached the score here:-

stock rom
-single score = 967/955
-multi score = 3111/3067
-vulkan score = 4256
-opencl = 3579

gsi's
-single score = 948
-multi score = 2619
-vulkan score = 3400
-opencl = 3500

how about all other experiences
i think the current stock rom which is the chinese rom is the best rom for pad pro 2021 now, it smooth and have modified gesture , feature for tablets, you just need to debloat app which you don’t want
 
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salzzz

Senior Member
Aug 27, 2011
125
12
i think the current stock rom which is the chinese rom is the best rom for pad pro 2021 now, it smooth and have modified gesture , feature for tablets, you just need to debloat app which you don’t want
The stock rom is doing pretty well. Unfortunately, there are some quirks:
- Google backup doesn't work
- Ctrl + W would close the whole browser instead of a tab

Meanwhile Dolby Vision and Widevine L1 don't currently work with GSI.
 
AutoRotate
When activating autorotate, the display is always orientated in the wrong direction by 270°.I tried to solve it with two different commands added to build.prop:
  1. "ro.sf.hwrotation=270" -> didn't do anything​
  2. "ro.surface_flinger.primary_display_orientation=ORIENTATION_270" -> the screen rotated in right direction, but the touchpanel did not.​
Workaround: using an rotation controll app, but I'm not a fan of it.
Have you a system app for display rotation ? I ran into same problem with P11 Pro when installing phhusson aosp 11 gsi. I noticed a lenovo app for rotation somewhere. Can't remember exact name and don't have tablet on hand to look. But there was an apk that got extracted by apk extractor when I let it extract all.
edit: it was landscapevision I was thinking of. what is LenovoLandscapeVision_LenovoMagicWindowContentProvider.apk and what does it do ?
 
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prozack1983

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Have you a system app for display rotation ? I ran into same problem with P11 Pro when installing phhusson aosp 11 gsi. I noticed a lenovo app for rotation somewhere. Can't remember exact name and don't have tablet on hand to look. But there was an apk that got extracted by apk extractor when I let it extract all.
edit: it was landscapevision I was thinking of. what is LenovoLandscapeVision_LenovoMagicWindowContentProvider.apk and what does it do ?
What do you mean? Have you tested it yet? Is it part of system overlay?
 
What do you mean? Have you tested it yet? Is it part of system overlay?
Meant I was searching for solution to same problem on a different tab. Landscapevision app was just something I noticed and wondered if it would help or what it does. There was one other on Tab P11 Pro that was interesting which was tab_p11_pro.apk and belive name in fs was Epos.They're in /system/priv-app but could be put in overlay when building I guess. Haven't tested anything been busy with twrp.
 

mcdull

Senior Member
Feb 15, 2007
969
75
Hong Kong
The Chinese origianl ROM ZUI have various verion for now.
<12.6
>=12.6
and the latest 13.1

All we know that 12.6 has some different firmware making downgrade to 12.5 much difficult, and thus it probably have different behavior over GSI. The latest 13.1 is an unkown as it is still not widely available (Lenovo pushing it by batch).

Is this GSI thread based on pre 12.6 or post 12.6 ZUI? Thanks.
 

salzzz

Senior Member
Aug 27, 2011
125
12
13.1 isn't due for the j716f though is it?
From the browser translation of the chinese lenovo forum here, a user said that it'd be out soon.

The Chinese origianl ROM ZUI have various verion for now.
<12.6
>=12.6
and the latest 13.1

All we know that 12.6 has some different firmware making downgrade to 12.5 much difficult, and thus it probably have different behavior over GSI. The latest 13.1 is an unkown as it is still not widely available (Lenovo pushing it by batch).

Is this GSI thread based on pre 12.6 or post 12.6 ZUI? Thanks.
I'm using GSI from stock v13.0.430. Both the steps and bugs are still the same.
 

mcdull

Senior Member
Feb 15, 2007
969
75
Hong Kong
I just received update of 13.1.549
But I am still in the very early stage of receiving this unit, so I am not unlocking the bootloader yet, just in case I need limited warranty.
 

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    How to install GSI ROM - Xiaoxin Pad Pro 2021 [TB-J716F]

    I tried to install a GSI ROM on this tablet, because there is only a chinese version available.
    The tablet supports treble and I managed to get different GSI ROMs booting on it, but with a few annoying bugs I couldn't solve.
    I thought I will share my experience here and maybe someone with more expierence can help to solve these problems.
    Your data will be deleted, try at your own risk.

    Treble Device Information (Treble Info):
    Required Image: system-arm64-ab.img.xz
    Supports modern version of treble and uses VNDK30.0
    Supports System-as-Root, uses A/B operating system
    Supports seamless upgrades and uses dynamic partitions (super partition)
    Requirements:
    Installation:
    1. Go to "Settings" ->"System" -> "About Phone", tab on it until developer settings are enabled.
    2. Go to "Developer Settings" and enable "USB Debugging", allow USB-Debugging if tablets asks.
    3. Reboot to bootloader: "adb reboot bootloader"
    4. Flash vbmeta.img: "fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img", you only need to flash it once
    5. Reboot to fastbootd: "fastboot reboot fastboot"
    6. Flash GSI-ROM: "fastboot flash system lir-v313+211012-arm64-bgZ-lite.img" and wait
    7. Using volume keys on tablet select "Enter recovery" and then select "Wipe data/factory reset", reboot device.
    8. Now it tries booting the ROM, after the "bootloader unlocked" warning, the lenovo logo should show up. Here I often had the problem that it didn't boot at first try. If, after waiting for 20-30s the ROM doesn't boot, press the power button to reboot tablet. After trying it a few times it always worked. This problem only occurs at first boot up, after setting the ROM up, it boots normally.
    9. Now after booting, when using the LiR-ROM, you have to set up the tablet. In the fourth setup window, the ROM is asking for a SIM-Card even though the tablet doesn't support GSM. You can skip this by entering to adb commands "adb shell settings put secure user_setup_complete 1" and "adb shell settings put global device_provisioned 1". After sending these two commands, then pressing return in the setup, it should complete.
    10. After successfully booting, the "Home" and "Tasks" button is missing. After a reboot they should appear and work normally but I recommend to set a lock pin first.
    Known Bugs/Problems:
    AutoRotate
    When activating autorotate, the display is always orientated in the wrong direction by 270°.​
    I tried to solve it with two different commands added to build.prop:​
    1. "ro.sf.hwrotation=270" -> didn't do anything​
    2. "ro.surface_flinger.primary_display_orientation=ORIENTATION_270" -> the screen rotated in right direction, but the touchpanel did not.​
    Workaround: using an rotation controll app, but I'm not a fan of it.​

    Overlay - AutoBrighness, Magnetic Screen Lock, Battery Save Mode
    I tried creating an overlay according to the instructions but sadly the "FrameworksResTarget.apk" from the vendor folder doesn't provide much configuration information including for the above mentioned issues. I tested values from similiar devices but didn't have any success. If someone is interested to try, here are the files I extracted from the tablet and the current overlay I created.​

    Hopefully, someone here knows how to solve these problems.
    4
    After a lot of jumping through hoops, I was able to get custom ROMs running on the tablet. Though I do want to share my experience with it.

    I chose to run BlissOS 15.3 on it the first time, and it worked quite well, despite the known bugs such as the rotation, adaptive brightness not working, and the phhTreble settings not working either. (Not sure if it is specific to the ROM but there's that.)

    A few things I noticed, TWRP would encrypt the partitions if you enabled a password on the system, and the decryption password is not the same as the one you set as the system password.

    Another thing is setting the screen cutout to anything else other than the default, to which it will cause the whole screen to turn to black, rendering it useless unless you wipe the data in recovery mode.

    I also found out that by changing the boot animation, it doesn't actually write on it, turning the bootanimation.zip file to 0 bytes when moved, a.k.a. it becomes non-existent, and thus when rebooting the tablet, it will drastically slow your device down. Sometimes it even heats up the device, I can even feel it through the casing.

    I also tried other Android 12 GSIs, including Android 12L ones, but it had a few more issues, especially the navigation bar on Android 12L.

    So for me, BlissOS works fine the best for me.

    If anyone can find out how to fix these kinds of issues, let us know.

    Thanks to @Tropaion for the instruction guide!
    3
    We should spam this forum thread, maybe then they will eventually react :D
    I am doing my damnedest! I also got PE12.1 running today after finally taking the plunge and just wanted to also say thanks for the initial write-up. It got me through the whole process with only a couple (tiny) snags.
    The command fastboot reboot fastboot(d) can be confusing 😁 I eventually ended up using the key combos to get where I needed due to my not having everything up to date and pristine.
    With the exception of the never ending autorotation bug and pixel launcher being not optimized for tablets, it is still miles above ZUI, imho.
    3
    hye xda-er,

    after flashing several gsi's (pixel experience a11/12 and octavi os),
    i found out that geekbench score is a bit worse than the stock rom,
    i attached the score here:-

    stock rom
    -single score = 967/955
    -multi score = 3111/3067
    -vulkan score = 4256
    -opencl = 3579

    gsi's
    -single score = 948
    -multi score = 2619
    -vulkan score = 3400
    -opencl = 3500

    how about all other experiences?