[RECOVERY][TWRP] Project Tango K1 ATAP TWRP 3.2.1

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akw701

Member
Mar 26, 2016
17
4
Lehre
HP Touchpad
Huawei Mate 8
Can we still use the TWRP recovery from here along with the bootloader modification you posted?

@ShapeShifter499: I installed the rom from highwaystar_ru, works fine. Now I try to install npjohnson's rom ttps://forum.xda-developers.com/shi...-atap-t4177581 following the instructions to the point. But I am getting stuck with installing the superuser via towelroot . It says this telephone is not supported. How did you manage to obtain su. I read that towelroot works on the stockrombecauses it uses a fault in the code. How did you got around this obstacle?

In addition I am facing temporary problems with adb, where I get sometimes error: device '(null)' not found

If it works I get stuck here
PS D:\Andreas-Eigene-Dateien\Downloads\yellowstone_pie_psci\yellowstone_pie_psci> adb shell su -c dd if=/dev/block/platform/sdhci-tegra.3/by-name/PES of=/sdcard/persist.img
/system/bin/sh: su: not found

So I am looking for a different way to obtain su

Any help welcome
 
highwaystar_ru & npjohnson - cheers to you and thank you for all your work on this device.

as much time as it took to get LINEAGE 16 to work and work correctly, i am curious , did you experience any of the TANGO (yellowstone) devices that were stock (not rooted, or tweaked) but different from each other ?

-i have seen 3 separate boot animations on these tablets, one spins the icon, another splits the icon into 40 little cubes and then re-combines them, and the most recent one , the tango icon splits off into fireworks then appears again just to repeat the firework action again.

-there are a few auction sites that sell these tablets for about 50 bucks PLUS a few dollars more for shipping, which to me seems like a great deal. is there any way to dig into the factory image to find changes the previous owners made? (stock - rooted 4.4) i ask this because using a FILE EXPLORER , every one of these devices i have,seems to have things left over from previous users .(short of a full IMAGE decompile)

(weird fact, but the battery in these is aged, but after a few tests on a CADEX, shows 95% life left or higher, of the ones i have picked up. This tells me these were used perhaps 30-40 times at most.) <two tablets i picked up and tested the battery actually gave a 99%battery rating, meaning these weren't used>

PS: PROJECT TANGO is a easy device to take apart, but it's not a speedy process ....
 
@ShapeShifter499: I installed the rom from highwaystar_ru, works fine. Now I try to install npjohnson's rom ttps://forum.xda-developers.com/shi...-atap-t4177581 following the instructions to the point. But I am getting stuck with installing the superuser via towelroot . It says this telephone is not supported. How did you manage to obtain su. I read that towelroot works on the stockrombecauses it uses a fault in the code. How did you got around this obstacle?

In addition I am facing temporary problems with adb, where I get sometimes error: device '(null)' not found

If it works I get stuck here
PS D:\Andreas-Eigene-Dateien\Downloads\yellowstone_pie_psci\yellowstone_pie_psci> adb shell su -c dd if=/dev/block/platform/sdhci-tegra.3/by-name/PES of=/sdcard/persist.img
/system/bin/sh: su: not found

So I am looking for a different way to obtain su

Any help welcome

did you try to go right into LINEAGE 16 from the ROM HIGHWAYSTAR_RU built , or did you restore the stock 4.4 first ?
( asking because i haven't had a chance to try this previous version of LINEAGE yet. )

no idea if this works, but try flashing the LINEAGE_SU, and then swapping to another SU / MAGISK / SUPER_SU/ etc.. type? (i would do a full ADB dump of the device before trying this, as i am not sure TWRP backups are the ENTIRE image.)
 

akw701

Member
Mar 26, 2016
17
4
Lehre
HP Touchpad
Huawei Mate 8
did you try to go right into LINEAGE 16 from the ROM HIGHWAYSTAR_RU built , or did you restore the stock 4.4 first ?
( asking because i haven't had a chance to try this previous version of LINEAGE yet. )

no idea if this works, but try flashing the LINEAGE_SU, and then swapping to another SU / MAGISK / SUPER_SU/ etc.. type? (i would do a full ADB dump of the device before trying this, as i am not sure TWRP backups are the ENTIRE image.)
I had TWRP installed first. From there I followed the thread instructions. Worked like charm. With TWRP I installed the the 14.1 rom from highwaystar_ru. No problems so far. Then I saw npjohnsons Lineage 16 and wanted to Upgrade. But being a beginner I stumbled into several pitfalls with ADB (Tablett was in recovery, but it needs to be booted into the normal system) The towelroot Su from the instructions did not work. Thought I had to roll back to kitkat. Got the Rom from the link in the TWRP thread. But next pitfall, I installed it into micro sd card folder. Did work when I shifted everything to the internal memory Backup folder. Being back on kitkat I tried towelroot again to gain SU access. No success either. But I got lucky with "SupersSU v2.82 SR5 Beta" from droidfilehost.com page.
With SU applied, knowledge that for Adb commands the tablet had to be normally booted, I followed the instructions for Lineage OS and succeeded in installing the unofficial December, 16th version.

Power supply issue is the biggest problem. Charging is unreliable. Best chance in the dock. Sometimes it works, sometimes not. Unplugging and replugging sometimes lets the indicator jump to more than empty. But I have never seen a full indication (would expect a filled symbol (green?)) even with 98% battery level booted in recovery mode.

Any ideas?
 
Power supply issue is the biggest problem. Charging is unreliable. Best chance in the dock. Sometimes it works, sometimes not. Unplugging and replugging sometimes lets the indicator jump to more than empty. But I have never seen a full indication (would expect a filled symbol (green?)) even with 98% battery level booted in recovery mode.

Any ideas?
[/QUOTE]


i have had similar issues with the dock charging. i noticed that the height of the connector in the dock is imperfect between others. (IE one dock connector sits 1.2mm higher than another) and i have also found that using switching power supplies vary in success.
my TANGO dock is connected to a 30amp DC supply with 2, old car audio (1.5f ) cap banks to clean up the ripple/noise. I also found 12.4 volts seems to be the sweet spot, (voltage @ power-supply -,, not 5.5mm connector- assuming typical losses over length of wire and points of contact ) (lets hope there is never a fault/short inside the tablet or dock , as those caps offer a world of instant current if needed, lol )

a few random switching supplies i tried, ( laptop, camera, etc..) had so much noise (terrible regulated DC) that it wouldn't charge at all. (most name brands were fine)

the dock - check the female barrel connector, as i had one which, required an xacto knife to re-bend the outer contact. (guessing previous owner yanked the connector out at a horrible angle)

- i think all the documentation tells of a 12V @ 3amp supply is needed, but the most i have ever seen was a hair over 2 AMPS . i suppose they account for extra power if you plug in a device to the USB3.0 port ? (the 12v DC @ 2 AMPS i saw , was only witnessed when first turning on a nearly dead tango on 4.4)

(if your in a pinch, a MILWAUKEE M12 USB adaptor works very well - its the same adapter used in there HEATED GEAR.. just need a 5.5mm barrel cable male-male .== MILWAUKEE HEATED GEAR uses a 5.5mm barrel plug)

depending on opportunity and free time, i may install a QCS spoofer board with-USB-C and 2S-battery charger board inside the tablet, with direct connection to battery, which would be easy because there is plenty of room inside the rear case .
The QCS spoof board is (trigger board) is tiny, and a 2cell lithium charger is as well (about the size and thickness of a nickle coin)

but before all this,
i want to see what changed inbetween the two builds, and if its possible to restore the charging to the dec-16 build, from the first one.(i havent had an opertunity to compare the two builds side by side, but i will, just need to have a day off work first. )
 

akw701

Member
Mar 26, 2016
17
4
Lehre
HP Touchpad
Huawei Mate 8
Update: I checked the dock. The board underneath the connector has no support and bends easily when the tablet is placed on the dock. I put a length of plastic tubing slightly larger than the space in the dock. So I am able to counter the bend of the connector board.As a result charging became reliable!! The first time I could observe the fully charged symbol in the off mode. Thanks again for the tip.
 

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  • 7
    Here is TWRP 3.2.1 build for Project Tango K1 ATAP.

    Download
    gdrive: twrp-3.2.1-yellowstone.img
    mailru: twrp-3.2.1-yellowstone.img

    Sources
    device tree: https://github.com/HighwayStar/android_device_google_yellowstone
    kernel: https://github.com/HighwayStar/android_kernel_google_yellowstone

    How to install
    1. enable USB debugging in stock ROM and run command: adb reboot bootloader
    2. Unlock bootloader using command: fastboot oem unlock (it will wipe all your user data!)
    3. With unlocked bootloader boot into stock rom and enable USB debugging again. Reboot to bootloader: adb reboot bootloader
    4. Flash recovery image: fastboot flash recovery twrp-3.2.1-yellowstone.img
    5. To boot into recovery you could run adb reboot recovery after booting to stock ROM or use Vol+ Vol- Power combo to boot in bootloader menu and select Recovery using volume keys and confirm by pressing Power.

    XDA:DevDB Information
    [RECOVERY][TWRP] Project Tango K1 ATAP TWRP 3.2.1, Tool/Utility for the Nvidia Shield Tablet

    Contributors
    highwaystar_ru
    Source Code: https://github.com/HighwayStar/android_kernel_google_yellowstone


    Version Information
    Status: Testing

    Created 2019-02-19
    Last Updated 2019-02-19
    3
    @highwaystar_ru gave me this ROM that is working splendidly on my yellowstone: https://cloud.mail.ru/public/Hmco/XryszodXm

    From @highwaystar_ru:

    It uses binary files from stock yellowstone and has some issues:
    cameras doesnt work, video playback sometimes has artifacts, all cpu
    cores always up (without it video playback lags), accelerometer sensor
    inverted.

    Me and couple of lineage devs working hard to port shieldtablet kernel
    to yellowstone, it will allow to use shield binary files and resolve
    most problems, but progress are really slow (but there is some
    progress lately).
    3
    Yeah I messaged @npjohnson here on XDA, he responded within a few hours, he simply said its a complicated install and he'd upload more when ready. (He is as of yesterday posting a 17.1 version)

    I haven't tried any of the newer builds since my first attempt.

    But if you hear back or try one of his builds ( https://download.ods.ninja/android/lineage/Yellowstone/ ) let us know how it goes.

    I was told from @highwaystar_ru that a modified tos.img and bootloader would be needed to boot any of his 15.1 builds. I asked about where to get those but I never got a reply yet.

    I noticed some LineageOS activity for the Google Tango Tablet Yellowstone at https://review.lineageos.org/q/yellowstone I still don't know if any bootloader or tos.img modifications are required. I did email the email attached to the user who uploaded some of those git commits listed, but I'm waiting to hear back.

    yeah its under the link posted , if you watch his downloads he's been posting nightly's I messaged him about it , installing ROM isn't straight forward flash through TWRP (I tried) and they are all unofficial builds (but they are looking at official status on lineage 16 *now)

    so it's just a matter of waiting, but considering the amount of activity on it lately i'm hopeful we'll get an official release soon

    Ah, I see. Well from my point of view I cant confirm that apx works. Actually sounds like that apx is the cause of your issue.

    I do know that TWRP and the ROM from highwaystar_ru do work unless you absolutely need bluetooth. So, again, my advice would be to install those. The ROM (14.1-20190208) is better than stock for the most part and you can always reflash that apx if you want. Follow the link and click the blue download button top center (its not in English). Probably best to do a TWRP backup of your current stock before flashing LOS even though its broken. If LOS fixes the issue you may be able to restore parts of the backup to return to stock.

    Please STOP using these builds. They WILL NOT work without our APX package, it's not quite ready, but should be soon^TM.

    Be patient, we're aiming for official support in the future :)
    1
    Back to life

    Thanks to highwaystar_ru I was able to install twrp and then lineage 14.1 with Open GApps pico.
    I hope that somebody will be able to bring this to 15.1
    1
    I'll try to get something together in the near future, no promises, my time is significantly limited