Develop Bugs

Flashing to stock Android NPD90G from TWRP error: "remote: unsupported command"

Flashing to stock Android NPD90G from TWRP error: "remote: unsupported command"
Fixed flashing error "remote: unsupported command" when flashing a Pixel C back to stock
I used TWRP and SuperSU to root and modify the buildprops to enable and get an early look at the windowing in Android N beta on my Pixel C release 5 ahead of time.
When Release 5 NPD90G was available I decided to flash back to stock from Developer Preview 4 NPD56N rooted with SuperSU and flashed with TWRP. I like root - I run Ubuntu and Win 7. I don't mind running a rooted device if it doesn't have all my work and financial data. When the final N release is out, the Pixel C will become my work machine. It's almost there.
I'm naturally paranoid. I change my long passwords frequently and use 2 factor authentication for everything. So if I can, I'll take a stock release. See my instructions for wiping Android devices: How to wipe an Android Phone: the paranoid editon
I could not flash the NPD90G stock bootloader because of an error "remote: unsupported command"
Here's how I fixed it.
Updated the SDK manager including SDK Tools and USB drivers.
With the Pixel C in recovery mode, {hold the power key and volume down}
In TWRP mount System and reboot to recovery
>ADB Shell.
From ADB Shell I ran
>fwtool vbnv write dev_boot_fastboot_full_cap 1 to reenable Fast boot.
Then I changed from TWRP to Fastboot mode {power button plus hold the volume up button}
>fastboot erase userdata
>fastboot erase boot
>fastboot erase cache
>fastboot erase recovery
>fastboot erase system
See Note 1. Below
>fastboot flash bootloader bootloader-dragon-google_smaug.7900.27.0.img
>fastboot reboot-bootloader
>fastboot flash bootloader bootloader-dragon-google_smaug.7900.27.0.img
>fastboot reboot-bootloader
Note 1.
The first time through I flashed the following line items which resulted in the resting robot Andi. I don't think I needed to do this, but if the above instructions don't work, run the following before continuing for {flash bootloader bootloader-dragon-google_smaug.7900.27.0.img}
>flash bootloader bootloader-dragon-google_smaug.7900.27.0.img
>fastboot reboot-bootloader
>fastboot reboot-bootloader
>fastboot flash system system.img
>fastboot flash boot boot.img
>fastboot flash recovery recovery.img
>fastboot flash cache cache.img

Twrp can't flash
The problem is that I can't boot into the twrp because when i try to flash it the answer is failed unsupported remote command

Tugio said:
The problem is that I can't boot into the twrp because when i try to flash it the answer is failed unsupported remote command
Click to expand...
Click to collapse
When in fastboot mode, use:
Code:
fastboot boot twrp-local-file-on-computer.img

DanBUK said:
When in fastboot mode, use:
Click to expand...
Click to collapse
It's nice of you to help a fellow XDA user. But I suspect he's already solved his problem of three months ago.....

Hi guys
I have the same problem:
- the bootloader is unlocked (Coreboot menu says so)
- fastboot says "secure: yes" but "unlocked: yes" too
- "fastboot flashing get_unlock_ability" returns "1"
- "fastboot flashing unlock" says that the bootloader is already unlocked
But I have no recovery and if I try to fastboot boot recovery.img it fails with signature verification error
Can I do something to unbrick the device?
Regards

lllopa said:
Hi guys
I have the same problem:
- the bootloader is unlocked (Coreboot menu says so)
- fastboot says "secure: yes" but "unlocked: yes" too
- "fastboot flashing get_unlock_ability" returns "1"
- "fastboot flashing unlock" says that the bootloader is already unlocked
But I have no recovery and if I try to fastboot boot recovery.img it fails with signature verification error
Can I do something to unbrick the device?
Regards
Click to expand...
Click to collapse
My solution is very simple:
fastboot flashing lock
fastboot flashing unlock
fastboot reboot
And now let it boot.... and wait.
After the (failed) reboot check again: Now you can write all partitions... worked with my Pixel C

Make sure you have the latest version of fastboot and adb. I get these errors almost every month if I don't update.
https://developer.android.com/studio/releases/platform-tools.html

@stevep2007, thank you so much! I've been dealing with this "remote: unsupported command" nonsense for days now after trying to revert back to an older Oreo version of Lineage. This did the trick!

How can I solve the problem when my Pixel C is not unlocked? My Pixel made an update and after installing the Update I got the green little man. Now I have no Chance to activate USB debugging etc. Its also not possible to install twrp.img
How can I go to ADB shell with locked bootloader? Or isn't it possible?
Fastboot devices shows me my tablet. ADB devices also show my tablet with "sideload".
But every try to flash my Pixel fails. I alway get the message .... remote: unknown command.......fastboot error: command failed
flash-all.bat showes that all "*.img are missing" error: command failed... unknown command etc.......
So any idea to get my Pixel working again? ADB shell would make it I think. But how with locked bootloader.

_Arne_ said:
My solution is very simple:
fastboot flashing lock
fastboot flashing unlock
fastboot reboot
And now let it boot.... and wait.
After the (failed) reboot check again: Now you can write all partitions... worked with my Pixel C
Click to expand...
Click to collapse
This did it for me!! Thanks much. I also updated platform-tools at the same time, who knows which did it

_Arne_ said:
My solution is very simple:
fastboot flashing lock
fastboot flashing unlock
fastboot reboot
And now let it boot.... and wait.
After the (failed) reboot check again: Now you can write all partitions... worked with my Pixel C
Click to expand...
Click to collapse
In the scenario described by @llopa this solution does not work.
In that scenario there are no solutions

bernardomarx said:
In the scenario described by @llopa this solution does not work.
In that scenario there are no solutions
Click to expand...
Click to collapse
Sorry replied incorrectly

Tried following the root for pixel 3xl, cant get past the fastboot mode now

What the title says. I was having an issue installing magisk entirely on the Pixel 3xl root guide, so I followed ubergeek77's advice which was to >fastboot flash boot_a patched_boot.img and fastboot flash boot_b patched_boot.img) manually.
and ever since I've done that, I cant get past the fastboot menu. Please help, I really hope I didnt brick it
When I try using fastboot boot patched_boot.img, after attempted to boot, I get an error saying "FAILED Status read failed (too many links)). After which, I have to manually boot back into recovery mode.
I'm getting the errors on my pixel "no valid slot to boot", "reboot bootloader", and "error booting boot.img"

The problem is probably those patched images. I would reflash your unpatched boot images to both slots a and b. That should get you back to square one.
Then repatch using same technique, but in Magisk Manager you need to set the update channel to custom. Go to settings/update channel and select custom. Paste this address in it: https://bit.ly/2N8UVlq
That's the famous Canary channel.
Then when you go to install/install/patch boot images file, you will be using Magisk 17.4 to do the patching. That's the key.
Sent from my Pixel 3 XL using Tapatalk

how do I reflash the image in the first place? What command should I use?

Get pixel in fastboot mode. Then from command prompt type [fastboot flash boot boot.img], assuming that's the name of your boot images and it's in the same folder you opened your command prompt from.
One nice little trick there is you can just type the [fastboot flash boot ]
Then just drag your boot image file with your mouse onto the command line and it'll type in the whole path even if you stored it in a different folder with a long arcane name!
Sent from my Pixel 3 XL using Tapatalk

after I enter the command flashboot boot patched_boot" the follow outputs
>sending 'boot_b'
>writing 'boot_b'
then it says Finished, and my phone just goes into a black screen, doesnt reboot.
I need to somehow revert the fastboot flash boot_a patched_boot.img and fastboot flash boot_b patched_boot.img commands

You can do the slots independently too, and would not hurt. Just like you did for the patched image, but for the stock image.
Fastboot flash boot_a boot.img and same for b.
Sent from my Pixel 3 XL using Tapatalk

Spoke too soon, I did the boot a and boot b to the crosshatch files, and it keeps going from 95% on the device to 100% on the device and back to 95%

ajtpak said:
after I enter the command flashboot boot patched_boot" the follow outputs
>sending 'boot_b'
>writing 'boot_b'
then it says Finished, and my phone just goes into a black screen, doesnt reboot.
I need to somehow revert the fastboot flash boot_a patched_boot.img and fastboot flash boot_b patched_boot.img commands
Click to expand...
Click to collapse
You need to do the same for slot a, which is probably the slot the phone was trying to boot from.
Sent from my Pixel 3 XL using Tapatalk

Entered the commands .\fastboot flash boot_a crosshatch_boot.img (original file)
Then .\fastboot flash boot_b crosshatch_boot.img
And then tried booting the pixel. It seems to be stuck on the ring reading 100% and 95%, keeps jumping back to 95%

Got back into my device, thank you so much! I'll follow the rest of what you sent earlier with magisk now and report back.

Got it rooted now, thank you so much for your help. I thought I bricked my device. Thank you

Phone now boot into fastboot but not system

Hi
I was trying to install Lineage OS on my device, but I failed, now the phone does not have TWRP anymore, and when I power up, it goes into fast boot only.
I have done quite a lot of work to save my phone, and the last thing that I did was download the stock fastboot rom and run flash_all.bat from it.
(I can not get the Miflash tool working on my PC because when I startup the program, it asks me to download 5 drivers, but it failed to download and throw me an error)

luckyvictor said:
Hi
I was trying to install Lineage OS on my device, but I failed, now the phone does not have TWRP anymore, and when I power up, it goes into fast boot only.
I have done quite a lot of work to save my phone, and the last thing that I did was download the stock fastboot rom and run flash_all.bat from it.
(I can not get the Miflash tool working on my PC because when I startup the program, it asks me to download 5 drivers, but it failed to download and throw me an error)
Click to expand...
Click to collapse
First of all - if your phone boots to fastboot, there seems to be a problem with your bootloader or kernel.
To fix that, you need to reflash aboot.img and boot.img via fastboot.
Boot.img depends on the version, you want to install. Copy both files into your fastboot folder and
Code:
fastboot flash boot_a boot.img
Code:
fastboot flash boot_b boot.img
Code:
fastboot flash aboot_a aboot.img
Code:
fastboot flash aboot_b aboot.img
Now your phone shouldn´t stuck @ fastboot anymore.
Ok, to save your data, you could try to boot twrp:
Code:
fastboot boot twrp.img
If you´re lucky, it can decrypt your data - then you can backup data and internal storage...
If it´s not able to decrypt, you need to install twrp.
To install a fastboot rom without miflash look here
I suggest you to install caf-kernel via twrp. Sometimes your phone boots up with it - magic

Voodoojonny said:
First of all - if your phone boots to fastboot, there seems to be a problem with your bootloader or kernel.
To fix that, you need to reflash aboot.img and boot.img via fastboot.
Boot.img depends on the version, you want to install. Copy both files into your fastboot folder and
Code:
fastboot flash boot_a boot.img
Code:
fastboot flash boot_b boot.img
Code:
fastboot flash aboot_a aboot.img
Code:
fastboot flash aboot_b aboot.img
Now your phone shouldn´t stuck @ fastboot anymore.
Ok, to save your data, you could try to boot twrp:
Code:
fastboot boot twrp.img
If you´re lucky, it can decrypt your data - then you can backup data and internal storage...
If it´s not able to decrypt, you need to install twrp.
To install a fastboot rom without miflash look here
I suggest you to install caf-kernel via twrp. Sometimes your phone boots up with it - magic
Click to expand...
Click to collapse
Thanks, will give it a try.
Just for my knowledge, what are these boot_a and boot_b please? they relate to the two sim slot in this device?

luckyvictor said:
Thanks, will give it a try.
Just for my knowledge, what are these boot_a and boot_b please? they relate to the two sim slot in this device?
Click to expand...
Click to collapse
Boot.img from fastboot rom... To be flashed in partition boot_a and boot_b. Our device is a AB-device. That means all partitions are doubled (except of data). If your system breaks, you can switch to the other slot by "fastboot set_active a" or b if you are on a.... Btw perhaps that fixes your phone too! Boot twrp and you can see which slot is active (under reboot)

Rooting Motorola G6 Play gone wrong

Hi everyone,
I bought a Motorola G6 play model XT1922-3 type 374B and wanted root acces on this device.
So I started by succesfully unlocking my bootloader using the following tutorial.
After this a started tried to root the device using this tutorial.
This tutorial doesn't link to boot images anymore so I was able to find the moto-g6-play-jeter-patched-twrp.img somewhere else.
I did the following things:
- reboot to bootloader [Succesfull]
- fastboot boot moto-g6-play-jeter-patched-twrp.img [Unsuccesfull]
The device did boot the twrp image but I was unable to interact with it in any way. I couldn't swipe or press buttons.
I made a short video to show this.
I wanted to retry the whole thing so I did reboot to bootloader but then I accidently entered the following command:
fastboot flash boot moto-g6-play-jeter-patched-twrp.img picture of command prompt
After this I wasn't able to normally boot my device. When I try to do so the screen goes black and says n/a in the left corner.
Please does anyone know how I could either be able to boot my normal stock rom again or to have a rooted rom?
Kind regards Sven Onderbeke

Hi Sven,
This isn't going to be the most advanced reply, as I'm not very experienced with this stuff either, but it seems you have accidentally flashed your twrp image to 'boot', wherever that is, which is why the phone isn't able to boot to system.
Can you still boot into bootloader and recovery (twrp)?
If so, then I'd suggest using fastboot to flash a sock or custom ROM. I'm not sure exactly which one though, you have basically the same model as me and that seems to use the JETER ROMS a list of which are over here (can't post links yet, so you will just have to search on mirrors . lolnet . com /firmware/moto/jeter/official/ or remove the spaces
I seem to have somehow lost the partitions on mine, but will start a new thread question about that.

Sven Onderbeke said:
Hi everyone,
I bought a Motorola G6 play model XT1922-3 type 374B and wanted root acces on this device.
So I started by succesfully unlocking my bootloader using the following tutorial.
After this a started tried to root the device using this tutorial.
This tutorial doesn't link to boot images anymore so I was able to find the moto-g6-play-jeter-patched-twrp.img somewhere else.
I did the following things:
- reboot to bootloader [Succesfull]
- fastboot boot moto-g6-play-jeter-patched-twrp.img [Unsuccesfull]
The device did boot the twrp image but I was unable to interact with it in any way. I couldn't swipe or press buttons.
I made a short video to show this.
I wanted to retry the whole thing so I did reboot to bootloader but then I accidently entered the following command:
fastboot flash boot moto-g6-play-jeter-patched-twrp.imgpicture of command prompt
After this I wasn't able to normally boot my device. When I try to do so the screen goes black and says n/a in the left corner.
Please does anyone know how I could either be able to boot my normal stock rom again or to have a rooted rom?
Kind regards Sven Onderbeke
Click to expand...
Click to collapse
Just flash a stock boot.img to boot. Then just flash TWRP to recovery. In TWRP, format data. Type yes. Then reboot recovery. Then Use TWRP to flash magisk. Done.

Hi again Sven,
I just wanted to let you know that I just downloaded the following RETAIL ROM
ALJETER_RETAIL_9.0_PPPS29.55-35-1_cid50_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml
and used the following fastboot commands, one at a time.
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash modem NON-HLOS.bin
fastboot flash fsg fsg.mbn
fastboot flash dsp adspso.bin
fastboot flash boot boot.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash oem oem.img
fastboot flash vendor vendor.img
fastboot erase carrier
fastboot erase userdata
fastboot erase DDR
fastboot flash logo logo.bin
fastboot reboot
Which rebooted into bootloader so pressed "start" and all booted fine now. It looks like we have the same device, so hopefully that will work for you too.

Can't install TWRP

I flashed my redmi note 8 pro indian version with miflash, and downgraded to android 9 from 11 to install Ubuntu touch.
Ubports installer still didnt recognize my phone I am guessing cause it was Begoniain(india) as opposed to Begonia(Global) that is supported.
But my problem is I want to go back to Android, and I dont know how to go back, I didn't have any recovery tool installed before installing Ubuntu Touch, now Ubuntu is very buggy, and I can't seem to install TWRP. I have no other recovery tools installed, just fastboot. I guess I should hvae installed twrp before installing Ubuntu Touch. I want to know how I can go back to android or to any other supported custom rom.
Thank you.

whats wrong with fastboot?

Hey, thanks for replying. I followed the steps in this video
which is a very accurate video i found after searching for many videos.
basically he asked to download the right TRWP, then ADB platform tools, then the ADB driver found here
[OFFICIAL][TOOL][WINDOWS] ADB, Fastboot and Drivers - 15 seconds ADB Installer v1.4.3
15 seconds ADB Installer v1.4.3 ADB, Fastboot and Drivers What is this? This is All-in-One installer for 3 most needed PC tools for Android. No need to download big SDK for 3 small things. I originaly made it for my Kurdish friend AnGrY DuDe in...
forum.xda-developers.com
then using "fastboot flash recovery twrp.img" cmd command
this seemed to work for many people and everything went well. but I just can't boot to twrp it just takes me to the ubuntu touch screen and i log back in to UT

xiaomi:
Code:
fastboot flash recovery twrp.img
fastboot oem reboot-recovery

aIecxs said:
xiaomi:
Code:
fastboot flash recovery twrp.img
fastboot oem reboot-recovery
Click to expand...
Click to collapse
I get this message
FAILED (remote: 'unknown command')
fastboot: error: Command failed

more commands I tried
'fastboot flash boot' gives me this error
fastboot error android_product_out not set
and 'fastboot boot recovery' command gives me this error
fastboot error cannot load 'recovery' no such file or directory
another command 'adb reboot bootloader' gave me this
error no devices/emulators found

I recommend to read 'fastboot help'
'fastboot flash' cmd requires two arguments: target (partition name) and source (path to file on pc)
'fastboot boot' cmd requires one argument only: source (path to file on pc)
'no such file or directory' means there exist no such file or directory with name 'recovery'
(Note this command requires bootable flag on current slot or will silently fail)
'fastboot oem' commands are device specific hidden commands. 'fastboot oem reboot-recovery' does not work on my device, but you will find lot suggestions for this here in forum (I just copy-pasted of xiaomi forum)
'adb' commands generally can't work in fastboot mode (and 'adb reboot bootloader' is fastboot mode btw)
if 'fastboot oem reboot-recovery' is unknown command, you can use 'fastboot reboot' instead. press and keep holding volume up while the phone reboots, it will enter recovery mode.

now the phone is stuck at restarting
i tried this 'fastboot erase data"
FAILED (remote: Partition table doesn't exist)
i just want a way to reset the phone back to android or other custom rom

Partition table doesn't exist?? you must have done something stupid...

aIecxs said:
I recommend to read 'fastboot help'
'fastboot flash' cmd requires two arguments: target (partition name) and source (path to file on pc)
'fastboot boot' cmd requires one argument only: source (path to file on pc)
'no such file or directory' means there exist no such file or directory with name 'recovery'
(Note this command requires bootable flag on current slot or will silently fail)
'fastboot oem' commands are device specific hidden commands. 'fastboot oem reboot-recovery' does not work on my device, but you will find lot suggestions for this here in forum (I just copy-pasted of xiaomi forum)
'adb' commands generally can't work in fastboot mode (and 'adb reboot bootloader' is fastboot mode btw)
if 'fastboot oem reboot-recovery' is unknown command, you can use 'fastboot reboot' instead. press and keep holding volume up while the phone reboots, it will enter recovery mode.
Click to expand...
Click to collapse
thank you i will try it

aIecxs said:
Partition table doesn't exist?? you must have done something stupid...
Click to expand...
Click to collapse
yes i think so, i think i should've installed twrp before that was the mistake, but i'll have to format this somehow

Did you try flash by mi flash the rom that you used to downgrade?

yes this is the first thing i tried, the same procedure i used to downgrade to 9 with mi flash, but when i do that it flashses in just 1 second, and gives success message, i was like it can't be that fast, but that happens everytime, so i figured somethings wrong. I turn on my phone and it's not flashed, it boots to ubuntu touch, but now even that's not happening, now it just keeps restarting after xiomi unlcoked screen.

i want to install a custom rom that goes best with my phone, i dont really want andriod to be honest, but need to have something installed to boot atleast, and I dont really mind if the phone goes dead, so i am not worried about experimenting on it

pp1pkew said:
yes this is the first thing i tried, the same procedure i used to downgrade to 9 with mi flash, but when i do that it flashses in just 1 second, and gives success message, i was like it can't be that fast, but that happens everytime, so i figured somethings wrong. I turn on my phone and it's not flashed, it boots to ubuntu touch, but now even that's not happening, now it just keeps restarting after xiomi unlcoked screen.
Click to expand...
Click to collapse
Try flash by sp flash tool. Maybe your partitions got fked by flash Ubuntu.

pp1pkew said:
i tried this 'fastboot erase data"
FAILED (remote: Partition table doesn't exist)
Click to expand...
Click to collapse
aIecxs said:
Partition table doesn't exist?? you must have done something stupid...
Click to expand...
Click to collapse
I believe that error message is misleading. It should mean
FAILED (remote: 'No such partition.')
you probably meant 'userdata' partition. however, I do not recommend fastboot erase cmd.
you should be able to enter fastboot mode with Volume Down button. instead of flashing TWRP into recovery partition (where it belongs) you could cheat bootloader and flash TWRP into boot partition instead. this will boot into TWRP recovery without Volume Up Button.
Code:
fastboot flash boot twrp.img
once in TWRP you can format Data, flash boot partition and install TWRP recovery.
probably easiest way is, create backup of boot + recovery from TWRP backup menu. that will create two files, boot.emmc.win + recovery.emmc.win in TWRP/Backups/<serialno>/<date> directory. just create another directory TWRP/Backups/<serialno>/my_files and place your files in there (rename boot.img = boot.emmc.win and twrp.img = recovery.emmc.win) then restore 'my_files' backup from menu.
then you can install any ROM from TWRP via System Image. Note that's android device, you can only install android. even ubports Ubuntu touch is not linux, it is just some gui build on top of android kernel to give you linux-like feelings.