Teclast M89 problem installing TWRP

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nexus856

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Dec 28, 2009
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Hi folks. As the title suggest I'm having problems installing TWRP recovery on teclast M89 tablet. I've tried a few different tutorials with no success. When I do it with fastboot it says that its installed, after that when I try to reboot the device, I'm stuck in bootloop. I've tried to do it a few times and its always the same problem. Does anyone have a solution? Thanks.
 
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Syntr@nic

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May 24, 2017
20
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HTC One (m7)
Samsung Galaxy A10

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Jmlanner

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Syntr@nic

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May 24, 2017
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HTC One (m7)
Samsung Galaxy A10
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Syntr@nic

Member
May 24, 2017
20
7
HTC One (m7)
Samsung Galaxy A10
Jmlanner said:
Tried it . Still cores1-3 offline. Perhaps I messed my kernel up through rooting and disabling encryption?
Click to expand...
Click to collapse
My setup:
TWRP (thanks @ValdikSS), encryption disabled, root with latest superSU, framework patched for signatur spoofing & microG.
Core 1 - 3 most offline, only core 0 running and on load core 4 + 5. All cores running only on heavy load. (cpuburn with 20 or more threads)

Sent from my Teclast M89 using XDA Labs
 
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Jmlanner

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Dec 2, 2013
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Syntr@nic said:
My setup:
TWRP (thanks @ValdikSS), encryption disabled, root with latest superSU, framework patched for signatur spoofing & microG.
Core 1 - 3 most offline, only core 0 running and on load core 4 + 5. All cores running only on heavy load. (cpuburn with 20 or more threads)
Click to expand...
Click to collapse
My setup:
TWRPalso from ValdikSs, encryption disabled. Root via patching boot.img with Magisk 19.3.
 
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Syntr@nic

Member
May 24, 2017
20
7
HTC One (m7)
Samsung Galaxy A10
Jmlanner said:
I have several apps.3C Toolbox Pro, EX Kernal Manger.FX Kernel Manger, and Kernel Auditor. I can't turn on cores 1-3 no matter what I try or what load I put on the CPU.
Click to expand...
Click to collapse
What I would do if I were you:
Make a Nandroid backup, flash the stock rom and check if all cores are running.
If the problem persists, it seems to be a defect of the device.

Sent from my Teclast M89 using XDA Labs
 
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Syntr@nic

Member
May 24, 2017
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HTC One (m7)
Samsung Galaxy A10
Jmlanner said:
So I took my M89 right back to stock via sptool. Still can't get cores 1-3 to come online with cpuburn. Perhaps I got a factory second MT8176 with fused cores?. I am thinking it maybe time to contact Teclast and ask why they sold me a three core device instead of a six core!
Click to expand...
Click to collapse
But with 3 cores less, the battery lasts longer. ;)
Good luck with your communication with Teclast.
I am very satisfied with my device.

Sent from my Teclast M89 using XDA Labs
 
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kamuikun

kamuikun

Senior Member
Mar 16, 2012
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neko.works
@ValdikSS

Do you have the files for the Teclast M89 Pro? I've tried but the M89 files don't work on the Pro.

I think it is a similar device, just the CPU on the Pro have 10 cores VS 8.

I have major issue with the stock firmware, RetroArch have huge slowdowns every 3-4 seconds due to a poorly implemented CPU governor I suppose - hoping to fix that with root.

Thanks!
 
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Oswald Boelcke
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    ValdikSS
    Teclast M89 TWRP 3.3.1

    Teclast M89 TWRP 3.3.1

    TWRP 3.3.1 for Teclast M89
    The archive includes:
    • ZIP file for flashing via stock recovery
    • IMG file for flashing via fastboot
    • TWRP source code
    Teclast M89 uses well-known firmware signature Android keys (test keys), that's why you can flash TWRP without unlocking the bootloader and erasing user data.
    Installation instruction is inside the archive.

    https://www.androidfilehost.com/?fid=6006931924117883832

    My small Teclast M89 website: https://teclast-m89.neocities.org/
    View
    1
    V
    ValdikSS
    Jmlanner said:
    This TWRP worked like a charm for me. I had already rooted via Magisk- but was really looking for a working TWRP for backing up before I really went crazy with mods.
    Thanks so much!!
    Click to expand...
    Click to collapse

    Make sure to backup nvram, nvdata, private partitions.
    View
    1
    J
    Jmlanner
    voland34 said:
    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
    Click to expand...
    Click to collapse
    Hi
    I think you are going to have to reflash the original Rom using SPFlahtool. Then you must install Magisk Manage on tabletr. Copy the boot image from the ROM files to Your phone. Then use Magisk Manager to Patch the copied boot image. Transfer modified boot image to PC. Use fastboot to flash modified boot image back onto the tablet. The long and the short of it is - you need to find a way to patch the boot image with Magisk before any TWRP will work.
    View
    1
    V
    ValdikSS
    voland34 said:
    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
    Click to expand...
    Click to collapse

    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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    S
    Syntr@nic
    Jmlanner said:
    Where do I find that.I have looked but not found a "ultra battersaver setting.
    Click to expand...
    Click to collapse
    I have it in quick settings tiles


    Sent from my Teclast M89 using XDA Labs
    View

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