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Teclast M89 problem installing TWRP

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By nexus856, Junior Member on 22nd January 2019, 05:03 PM
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28th June 2019, 03:52 PM |#11  
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Quote:
Originally Posted by voland34

Hi, i tried this method but couldnt boot in system, only twrp all the time. after initial install this TWRP 3.3.1, it bootlooped in twrp but storage wasnt seen in pc, so i formatted data and restarted in twrp. from there it couldnt restart system anymore. actually i managed to flash magisk 19.3 . i flased another version of twrp 3.2.3 that seemed to work fine, to see if it was the version, and it bootloops (restarts until logo) all the time. Any hint please?

It says in little print "your device now unlocked...your device will boot in 5 seconds" but restart. Cant get it into fastboot by volume up; unresponsive at all. just bootloops in logo.
Any help is very much appreciated. thanks

It seems OEM unlock fills "para" partition with some data which forces it to boot into recovery. Stock recovery reads this data and perform data partition wipe or something similar, but TWRP does not handle this data and you get a boot loop. You can fix that by cleaning "para" partition. Execute the following command while booted into TWRP, either from TWRP terminal itself or from adb shell:
Code:
dd if=/dev/zero of=/dev/block/platform/mtk-msdc.0/11230000.MSDC0/by-name/para
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28th June 2019, 04:18 PM |#12  
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Quote:
Originally Posted by ValdikSS

It seems OEM unlock fills "para" partition with some data which forces it to boot into recovery. Stock recovery reads this data and perform data partition wipe or something similar, but TWRP does not handle this data and you get a boot loop. You can fix that by cleaning "para" partition. Execute the following command while booted into TWRP, either from TWRP terminal itself or from adb shell:

Code:
dd if=/dev/zero of=/dev/block/platform/mtk-msdc.0/11230000.MSDC0/by-name/para

Ok, i'll try. Thanks!
30th June 2019, 01:51 PM |#13  
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Does anybody know if this guide also works for the new Teclast M89 PRO-model???
4th July 2019, 09:52 PM |#14  
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Quote:
Originally Posted by gizmo862

Does anybody know if this guide also works for the new Teclast M89 PRO-model???

No, most probably it won't. PRO model has different SoC/CPU.
28th July 2019, 03:30 PM |#15  
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Quote:
Originally Posted by gizmo862

Does anybody know if this guide also works for the new Teclast M89 PRO-model???

No. It won't. I bricked my ****ing tablet. It refuses to reboot once it's unlocked because (as the screen say) it is now untrusted. There is no way to relock the bootloader again and the the tablet is stuck in a bootloop.

Teclast is ****.
1st August 2019, 05:35 PM |#16  
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Hello i'm new in XDA, i have this tablet althougth i can't conect the hdmi port to the tv, the screen keep in black, i think it's because of the display format (4:3) can the root solve this problem?

Thank You!!
3rd August 2019, 02:58 PM |#17  
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Quote:
Originally Posted by w1nst0n sm1th

No. It won't. I bricked my ****ing tablet. It refuses to reboot once it's unlocked because (as the screen say) it is now untrusted. There is no way to relock the bootloader again and the the tablet is stuck in a bootloop.

Teclast is ****.

The bootloop is not because you've unlocked the bootloader, but most probably because the firmware is designed to perform userdata partition setup in the recovery upon first boot, and you don't have stock recovery, that's why it can't finish formatting procedure.
This could be fixed by flashing stock recovery and booting once.
You can ask for a firmware from Teclast (I used to ask them on vkontakte because they didn't respond my mails), they will provide it.

OR you can write zeros to "para" partition using fastboot, it should do the trick too.

---------- Post added at 16:58 ---------- Previous post was at 16:56 ----------

Quote:
Originally Posted by Edgaralanmx

Hello i'm new in XDA, i have this tablet althougth i can't conect the hdmi port to the tv, the screen keep in black, i think it's because of the display format (4:3) can the root solve this problem?

Thank You!!

Try to unplug/plug again HDMI cable several times. It seems that the HDMI controller or drivers are buggy.
To change the resolution I use "SecondScreen" software (requires root).
3rd August 2019, 06:42 PM |#18  
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Hi guys,

I´m looking for a working rooting method for my Teclast M89 Pro model ??
Any idea ?? What about the "One Click Root" Program ???
Thank´s a lot
18th August 2019, 03:12 PM |#19  
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The device was trying to root.
I get the following information when restarting:

Quote:

orange state
the device has been unlocked and can't be trusted
your device will boot in 5 seconds

When I try TWRP via sideload or recovery menu I get the following:
Quote:

Supported API:3
-- Install /sdcard/teclast_m89_twrp_311.zip ...
Finding update packacke ...
Opening update package ...
Verifying update package ...
Update package verification took 0.5 s (result 0).
Installing update ...
E:Failed to find META-INF/com/android/metadata in update package.
Installing Teclast M89 TWRP Recovery
script succeeded: result was [1.000000]

Install from SD Card complete.

But TWRP is not installed.
Where is the problem?
19th August 2019, 02:22 PM |#20  
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Quote:
Originally Posted by kumpi

But TWRP is not installed.
Where is the problem?

Are you trying to enter recovery right after flashing it, without booting the OS first? I think you need do enter TWRP right after flashing it.
20th August 2019, 07:46 AM |#21  
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Quote:
Originally Posted by ValdikSS

Are you trying to enter recovery right after flashing it, without booting the OS first? I think you need do enter TWRP right after flashing it.

Thank you!!
That was it.
Now it works.
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