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Can't install TWRP in Android 9

I was running stock OOS with Android 8.1 with the normal TWRP and Magisk working. When the OOS 9 got out, I installed the full OTA through TWRP (dirty flash) and everything went perfectly, with no problems whatsoever, but I lost TWRP and Magisk, of course.
Now in Android 9 I can't seem to reinstall TWRP (I'm trying with the latest bluespark): I can boot TWRP from fastboot and install Magisk, everything is fine, Magisk works great. However, when I try to install the TWRP zip (through the fastboot loaded TWRP), the phone freezes at the bootloader warning and doesn't boot (and I have to reinstall the full OTA zip to get the phone working again). Or, some other times, it reboots always to the recovery and never to the OS. Any ideas on how to solve this? Thanks in advance.

What version of bluespark are you using ?? v2

Glsoto said:
What version of bluespark are you using ?? v2
Click to expand...
Click to collapse
9.85v2

first fastboot boot twrp.img, the install twrp.zip , reboot recovery and then magisk..

I also tried to fastboot boot blu_spark twrp V2 IMG.... This ended in a black screen. I used the latest official twrp without a problem on pie.

Glsoto said:
first fastboot boot twrp.img, the install twrp.zip , reboot recovery and then magisk..
Click to expand...
Click to collapse
Thanks! Did it in that exact order and now everything works. I was forgetting to reboot the recovery before installing Magisk.

don't flash magisk on the temporary TWRP

Hexyl said:
I also tried to fastboot boot blu_spark twrp V2 IMG.... This ended in a black screen. I used the latest official twrp without a problem on pie.
Click to expand...
Click to collapse
Cuz of kernel panic. When you boot into twrp after fastboot command - unplag your cable from pc when the command is done, then disable mtp, connect to pc and re-enable mtp.
Dont forget to click thanks
And yeah, use blu spark's TWRP, not official one

Came here from google.
Glsoto said:
first fastboot boot twrp.img, the install twrp.zip , reboot recovery and then magisk..
Click to expand...
Click to collapse
This procedure didn't work for me, for some reason "fastboot boot twrp.img" was leading to black screen.
What worked for me was
1) Boot to fastboot
2) fastboot flash twrpXXX.img
3) Without rebooting, select recovery from fastboot's bootloader menu
4) If you are able to boot in twrp this time, then flash blu spark twrp.
5) Reboot
6) Try to reboot in recovery as usual
If all worked well, you should see twrp recovery.
Cheers.

Alekcander said:
Came here from google.
This procedure didn't work for me, for some reason "fastboot boot twrp.img" was leading to black screen.
What worked for me was
1) Boot to fastboot
2) fastboot flash twrpXXX.img
3) Without rebooting, select recovery from fastboot's bootloader menu
4) If you are able to boot in twrp this time, then flash blu spark twrp.
5) Reboot
6) Try to reboot in recovery as usual
If all worked well, you should see twrp recovery.
Cheers.
Click to expand...
Click to collapse
Hi
I have same problem ... after installing twrp i have black scream. twrp doesnt boot
I trying to use this method but cmd give me ]
C:\Android>fastboot flash twrp-3.3.1-x_blu_spark_v9.101_op6.img
unknown partition 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
error: cannot determine image filename for 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
I have restored phone with msn download
OnePlus is again unlocked
I have this problem sins i tried to install magisk and after reboot my op doesn't boot to OS with crash error
any ideas ?

jasiorr said:
Hi
I have same problem ... after installing twrp i have black scream. twrp doesnt boot
I trying to use this method but cmd give me ]
C:\Android>fastboot flash twrp-3.3.1-x_blu_spark_v9.101_op6.img
unknown partition 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
error: cannot determine image filename for 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
I have restored phone with msn download
OnePlus is again unlocked
I have this problem sins i tried to install magisk and after reboot my op doesn't boot to OS with crash error
any ideas ?
Click to expand...
Click to collapse
You need to Fastboot boot twrp. Img

jasiorr said:
Hi
I have same problem ... after installing twrp i have black scream. twrp doesnt boot
I trying to use this method but cmd give me ]
C:\Android>fastboot flash twrp-3.3.1-x_blu_spark_v9.101_op6.img
unknown partition 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
error: cannot determine image filename for 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
I have restored phone with msn download
OnePlus is again unlocked
I have this problem sins i tried to install magisk and after reboot my op doesn't boot to OS with crash error
any ideas ?
Click to expand...
Click to collapse
yldlj said:
You need to Fastboot boot twrp. Img
Click to expand...
Click to collapse
Alekcander said:
Came here from google.
This procedure didn't work for me, for some reason "fastboot boot twrp.img" was leading to black screen.
What worked for me was
1) Boot to fastboot
2) fastboot flash twrpXXX.img
3) Without rebooting, select recovery from fastboot's bootloader menu
4) If you are able to boot in twrp this time, then flash blu spark twrp.
5) Reboot
6) Try to reboot in recovery as usual
If all worked well, you should see twrp recovery.
Cheers.
Click to expand...
Click to collapse
I have the same problem as Alekcander
When I try to use command ,, fastboot boot twrp-xxx.img nothing happens. I mean mobile restart as always but there is only black screen and notification diode shine white ...
Also Alekcander method doesn't work:
C:\Android>fastboot flash twrp-3.3.1-x_blu_spark_v9.101_op6.img
unknown partition 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
error: cannot determine image filename for 'twrp-3.3.1-x_blu_spark_v9.101_op6.img'
I tried official twrp and is the same , I tried to disconnect from usb when mobile is restarting also nothing ...
so again ... I have restored phone with msn download -> unlock bootloader...
i have this issue sins i tried to install magisk and after reboot my OP6 doesn't boot to OS and give crash error
any other ideas ?

Solved I have to update system to more recently version. Why twrp doesn't work with oxygen is 5.1.5 ?

Soft Bricked after installing YT Vanced and did a restore with Blu Spark twrp?

Hi All,
I think I soft bricked my device, after installing YouTube Vanced from Magisk my screen went all nuts, random apps were started and the device became unusable. I uninstalled Vanced but the weird behavior kept going on.
So I decided to do a Nandroid backup restore from within Blu Spark TWRP. After a reboot the device does not come up with the restored OS (Oxygen Pie 9.0.2) I can't boot into Blu Spark so basically I can't do nothing except get into bootloader every now and then. I tried to flash TWRP (fastboot flash recovery twrp.img) I see that it flashes but then I can't get into TWRP. Fastboot boot twrp.img doesn't work either.
I followed this guide (https://forum.xda-developers.com/oneplus-6/how-to/rom-stock-fastboot-roms-oneplus-6-t3796665) but that didn't work either.
What can I do to get the stock rom installed and get the device working again?
Thanks for any help!

fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
fastboot flash system_a system.img
fastboot flash system_b system.img

Thank you! Where do I get the system.img?
Found them, I will try.

ADB devices doesn't find my device, the device keeps coming back in the bootloader but then I can't ADB anything because the device is not found. What now?

I did:
fastboot flash boot_a boot.img
fastboot flash boot_b boot.img
fastboot flash system_a system.img
fastboot flash system_b system.img
Looks like the files got written to the device, the rebooted and then I got the unlock screen then the screen goes to black with a blue led burning. Thats all that happening. Anybody any advice?

download unimod and uninstall just that magisk module

Bootloop to fastboot

Bootloop to fastboot after being on dp3, and restoring carbon. I tried fastboot boot twrp.img, but it fails....I also tried fastboot flash it, it does, but still reboots to fastboot. Any suggestions?

I assume you had TWRP installed when this condition occurred, and trying to boot TWRP just sent you to fastboot?
What was the exact error message when trying to fastboot boot TWRP?

suzook said:
Bootloop to fastboot after being on dp3, and restoring carbon. I tried fastboot boot twrp.img, but it fails....I also tried fastboot flash it, it does, but still reboots to fastboot. Any suggestions?
Click to expand...
Click to collapse
try this one
https://forum.xda-developers.com/oneplus-7-pro/how-to/rom-stock-fastboot-roms-oneplus-7-pro-t3931424
had the same problem and it helped

redpoint73 said:
I assume you had TWRP installed when this condition occurred, and trying to boot TWRP just sent you to fastboot?
What was the exact error message when trying to fastboot boot TWRP?
Click to expand...
Click to collapse
It sends the file...then I get a remote error. I tried fastboot flash too. It completed, but still boots to fastboot. Guess msm tool is needed. This phone is a pita.

I cannot get twrp to boot.....Phone refuses to boot it. WTF???

Have you tried this specifically?
Code:
fastboot flash boot recoveryname.img
I was stuck in fastboot yesterday after doing a TWRP restore. The issue was I did a backup and restore including boot and system/vendor.
My thread from a few days ago: https://forum.xda-developers.com/oneplus-7-pro/help/please-help-fastboot-boot-loop-twrp-t3949952

i.Design said:
Have you tried this specifically?
Code:
fastboot flash boot recoveryname.img
I was stuck in fastboot yesterday after doing a TWRP restore. The issue was I did a backup and restore including boot and system/vendor.
My thread from a few days ago: https://forum.xda-developers.com/oneplus-7-pro/help/please-help-fastboot-boot-loop-twrp-t3949952
Click to expand...
Click to collapse
LOL...Um, yes.

Use the All-In-One Tool and flash a fastboot firmware zip (you can find downloads in the software itself). After flashing your back on OOS and can use fastboot to boot TWRP again, then install or restore your rom

Stuck at fastboot splash screen

Hi everyone, recently unrooted and re-locked my bootloader. Decided I enjoyed my OnePlus rooted better, so I've unlocked bootloader again and downloaded latest twrp.img and .zip.
Upon entering fastboot mode and using
"fastboot boot recovery.img"
it runs fine then hangs on the FASTBOOT MODE screen with OnePlus logo. Doesn't ever boot into twrp. I've tried on both slots A and B and multiple versions of twrp and they all hang on the FASTBOOT splash screen. Any ideas? I haven't bricked my phone all I'm looking to do is get into twrp.
Thanks in advance

Drewmac said:
Hi everyone, recently unrooted and re-locked my bootloader. Decided I enjoyed my OnePlus rooted better, so I've unlocked bootloader again and downloaded latest twrp.img and .zip.
Upon entering fastboot mode and using
"fastboot boot recovery.img"
it runs fine then hangs on the FASTBOOT MODE screen with OnePlus logo. Doesn't ever boot into twrp. I've tried on both slots A and B and multiple versions of twrp and they all hang on the FASTBOOT splash screen. Any ideas? I haven't bricked my phone all I'm looking to do is get into twrp.
Thanks in advance
Click to expand...
Click to collapse
You have to flash a patched boot.img that matches your OS from fastboot and install twrp installer from magisk as a module

Twrp 3.3.1-65 by mauronofrio works. I don't think official 3.3.1.4 twrp works.
And like GUGUITOMTG4 sad follow this guide :
https://forum.xda-developers.com/on...isk-patched-boot-image-oneplus-7-pro-t3964345

null0seven said:
Twrp 3.3.1-65 by mauronofrio works. I don't think official 3.3.1.4 twrp works.
And like GUGUITOMTG4 sad follow this guide :
https://forum.xda-developers.com/on...isk-patched-boot-image-oneplus-7-pro-t3964345
Click to expand...
Click to collapse
Not working.

NqX said:
Not working.
Click to expand...
Click to collapse
The fastboot boot twrp command isn't working with Android 10. Should flash patched boot img as easiest method.

GUGUITOMTG4 said:
The fastboot boot twrp command isn't working with Android 10. Should flash patched boot img as easiest method.
Click to expand...
Click to collapse
How? No root. Fastboot boot twrp working android 10, but i have fastboot splash screen.

NqX said:
How? No root. Fastboot boot twrp working android 10, but i have fastboot splash screen.
Click to expand...
Click to collapse
First, hold power+vol up buttons for 15 sec to get out of the fastboot frozen screen.
When it shuts down, hold power+volume up again for a few seconds. That should boot it into bootloader.
On the computer download the correct patched image for your OS version https://forum.xda-developers.com/on...isk-patched-boot-image-oneplus-7-pro-t3964345
Place it in the fastboot folder on the computer, connect the phone to computer while on bootloader and input the commnd: fastboot flash boot magisk_patched.img

Any help for OP6 stuck on "Boot Loader is unlocked" warning page ?

Hi everybody,
I tried to update my OOS to Android Q while keeping magisk, there was probably a module not compatible that I forgot to remove before and I could not access the interface after rebooting.
Trying to restore the stock boot.img with fastboot, now I am stuck on the "Boot Loader is unlocked" warning page and the phone refuses to boot.
I tried to wipe everything using fastboot -w but still can't boot normally, if anyone can help me solve this please, I would be grateful.
Regards.

Try flashing the unofficial TWRP for Q from here
You can follow that guide but don't install Magisk, then after successful boot, try flashing Magisk uninstaller in TWRP.

Can try flashing android 10 boot.img from #2 link.

this happened to me. It was because I had the usb pluged. If you take the usb out it will boot. Or at least mine worked that way.

What I did was completely restoring the device by flashing a fastboot ROM then updating to Q again. SO I've lost all my data.
Do you know any way I can root android Q actually ?

https://forum.xda-developers.com/oneplus-6/how-to/how-to-flash-twrp-magisk-android-10-t3988213

danecr7 said:
Hi everybody,
I tried to update my OOS to Android Q while keeping magisk, there was probably a module not compatible that I forgot to remove before and I could not access the interface after rebooting.
Trying to restore the stock boot.img with fastboot, now I am stuck on the "Boot Loader is unlocked" warning page and the phone refuses to boot.
I tried to wipe everything using fastboot -w but still can't boot normally, if anyone can help me solve this please, I would be grateful.
Regards.
Click to expand...
Click to collapse
If you have access to fastboot then you can flash twrp and do below steps exactly else you will stuck at bootloader warning message
Reboot to fastboot mode. Flash TWRP img using the following command--> Oneplus blocked fastboot boot command
Code:
fastboot flash boot twrp-******.img
From fastboot mode, reboot directly to recovery mode. Now you have a working TWRP. (If you already have Magisk earlier, flash Magisk uninstaller now before proceeding to the next steps)
In TWRP, flash the stock boot image in boot partition. Don't reboot .
Flash TWRP installer zip then reboot to recovery. You now have a fully working TWRP in OOS 10. . Don't reboot .
Flash Magisk v20.1. Reboot to system.