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[Q] Can't boot after CM9[SOLVED]

Hey XDA
I tried to install CM9 today, it fail...
I have unlocked my phone using htcdev.com.
Then I followed this:
If you unlocked your phone via htcdev.com, you must flash the included
boot.img after flashing the ROM in recovery:
- Boot into fastboot, either by:
- Turning phone on whilse holding VOLUME DOWN, or
- adb reboot bootloader, or
- using an option in your recovery (eg. Reboot Bootloader)
- Connect your phone to your PC and copy the boot.img from the ROM .zip
to the same place as fastboot.exe and issue the following command:
- fastboot flash boot boot.img
Failing to follow these instructions on a htcdev.com unlocked device will
cause the ROM to fail to boot.
And now it just stands with a mobile and a ret warning sign. I can get in bootloader, but that's all. I have the CM9.zip on the sdcard but I forgot to run it before I did the above mentioned. I have tried to reset the mobile from bootloader nothing helps
Pleas help me what should I do?

So what is your problem exactly ? Do you have a custom recovery like 4EXT ? It's needed in order to apply the CM9.zip.

None
No i have not installed any recovery app. I cant start my mobile

Naaler said:
Hey XDA
I tried to install CM9 today, it fail...
I have unlocked my phone using htcdev.com.
Then I followed this:
If you unlocked your phone via htcdev.com, you must flash the included
boot.img after flashing the ROM in recovery:
- Boot into fastboot, either by:
- Turning phone on whilse holding VOLUME DOWN, or
- adb reboot bootloader, or
- using an option in your recovery (eg. Reboot Bootloader)
- Connect your phone to your PC and copy the boot.img from the ROM .zip
to the same place as fastboot.exe and issue the following command:
- fastboot flash boot boot.img
Failing to follow these instructions on a htcdev.com unlocked device will
cause the ROM to fail to boot.
And now it just stands with a mobile and a ret warning sign. I can get in bootloader, but that's all. I have the CM9.zip on the sdcard but I forgot to run it before I did the above mentioned. I have tried to reset the mobile from bootloader nothing helps
Pleas help me what should I do?
Click to expand...
Click to collapse
1.install a custom recovery like 4ext or cwm
(2. Backup current system) this time you don't have to do this since you don't have a working system at the moment.
3. Full wipe (data, system, boot, caches... Not sd card) from recovery
4. Flash ROM zip from recovery
5.flash boot.img via adb
6.reboot
7.done
Sent by my fingers to your head.

How?
The recovery app Is it ón the computer or the Mobile?
ón Mobile how do i get it ón?

1.install a custom recovery like 4ext or cwm
(2. Backup current system) this time you don't have to do this since you don't have a working system at the moment.
3. Full wipe (data, system, boot, caches... Not sd card) from recovery
4. Flash ROM zip from recovery
5.flash boot.img via adb
6.reboot
7.done
Click to expand...
Click to collapse
That's it.
here is 4ext 2.2.7: http://dl.dropbox.com/u/45382761/PG88IMG_4EXTrecovery_2.2.7_RC5_Desire_S.zip
Extract the "recovery.img" and flash it using fastboot:
fastboot flash recovery recovery.img

Thanks
Thanks it works now

Naaler said:
The recovery app Is it ón the computer or the Mobile?
ón Mobile how do i get it ón?
Click to expand...
Click to collapse
I'm assuming you know how to boot into fastboot and use fastboot and adb commands. If not, just click on the link in my signature under Helpful links.
Once you're done, just put the attached file in your adb folder, then boot into fastboot and issue the command ;
fastboot flash recovery recovery.img
Click to expand...
Click to collapse
You will now have the custom 4EXT Recovery. From there, just follow the steps you outlined in your first post, and you should be up and running.
Cheers.
EDIT: I see you already got it working while I was composing my post. Congrats!

@op could you please update the thread title to something like [solved]
Sent by my fingers to your head.

TWRP - No command

Hi can someone help me
I fastboot installed twrp when I try to reboot to recovery I get a no command and tried the power and volume up but takes to me to stock recovery.
I flashed elemental kernel after install does that wipe twrp or something?

Using Magisk as well

did you do fastboot boot twrp.img and then flash the zip in twrp or did you just try to flash the image file using fastboot flash recovery twrp.zip?

r29 said:
Hi can someone help me
I fastboot installed twrp when I try to reboot to recovery I get a no command and tried the power and volume up but takes to me to stock recovery.
I flashed elemental kernel after install does that wipe twrp or something?
Click to expand...
Click to collapse
You need to fastboot boot twrp image, install twrp-pixel-installer-sailfish-3.0.2-0-RC1, reboot recovery, if you want root, then install SuperSU, reboot.

Tulsadiver said:
You need to fastboot boot twrp image, install twrp-pixel-installer-sailfish-3.0.2-0-RC1, reboot recovery, if you want root, then install SuperSU, reboot.
Click to expand...
Click to collapse
exad said:
did you do fastboot boot twrp.img and then flash the zip in twrp or did you just try to flash the image file using fastboot flash recovery twrp.zip?
Click to expand...
Click to collapse
Thanks for the help problem solved
I was reboot system after fastboot boot twrp.img and installing zip so it didnt give me the option to allow modification

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 ?

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

[ AIO ] Guide TECNO SPARK 5 PRO (KD7) bootloader unlocking,root,twrp & stock firmware

AIO GUIDE TECNO KD7
1. Bootloader Unlocking
1. Download & install the ADB driver
2.Enable devloper mode by taping on Build verson(setting->my phone) then enable Oem Unlock & usb debugging from (settings->System->Devloper option)
3.Now connect device & open ADB path & run cmd
command: ADB devices
then reboot to bootloader
command: ADB reboot bootloader
4. unlock bootloader
command: fastboot flashing unlock the phone will ask to confirm
5. now reboot to system
command:fastboot reboot
If you are stuck waiting for the device screen
2. TWRP [unoficial]
https://forum.xda-developers.com/t/twrp-recovery-for-tecno-kd7.4378493/
3. Orange state disabler:
Flashing guide & zip file
Click Wipe →Format Data → Yes → Press Enter.
Then Click Reboot → Recovery (Reboot to Recovery ).
After this, TWRP Recovery Mode will be installed on your phone
Link: Orange disabler.zip
4. Root
1.boot into recovery
2. Flash magisk .zip
llink:https://github.com/topjohnwu/Magisk/releases/download/v21.0/Magisk-v21.0.zip
3.1. Unroot
1.boot into recovery
2. Flash magisk unistaller .zip
link:https://github.com/topjohnwu/Magisk/releases/download/v21.0/Magisk-uninstaller-20201003.zip
5.Stock Firmware Files
Stock boot ,stock recovery & Full Firmware are added
To Flash full firmware
Extract zip & run flash.bat
Link: TECNO-SPARK-5-PRO-KD7-H6211FQRSTU-Q-GL-211101V404-fastboot flash full rom.zip
6. Gsi rom / Custom rom Installation guide:
https://forum.xda-developers.com/t/custom-rom-for-tecno-phone-dynamic-partition.4379341/
vendor : ( 3 sim problem guide )
TECNO-SPARK-5-PRO-KD7-H6211FQRSTU-Q-GL-211101V404
7. Phone Hard Brick fix
https://forum.xda-developers.com/t/phone-soft-brick-phone-on-off-poblem-tecno-device.4378501/
7.1. Flash file:
Link :
TECNO-SPARK-5-PRO-KD7-H6211FQRSTU-Q-GL-211101V404
HIT THE THANKS BUTTON IF ABOVE INFORMATION IS HELPFUL TO YOU

Tecno kd7 full guide
https://forum.xda-developers.com/t/...r-unlocking-root-twrp-stock-firmware.4345557/

What do you mean by boot into recovery? Going fastboot mode? And then writing fastboot flash recovery magisk.zip( for step 3(root)) ?
Also should have the updatest kd7 before rooting?
Thanks in advance for your hard work.

Tanjin01: Thanks
Fast time twrp recovery install: (any bulid version)
[command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
fastboot reboot recovery
[command]
Now boot into twrp recovery and from there "wipe option->Format Data -> yes Format.
Next, Reboot option -> recovery click Wait reboot recovery and flash magisk.zip
Any time root and unroot:
2.going to recovery
Open recovery and install magisk zip. /Magisk uninstall flash

Parvej789 said:
Tanjin01: Thanks
Fast time twrp recovery install: (any bulid version)
1.Fastboot flash recovery .
Fastboot reboot recovery -
Open recovery -wipe format data-yes.
reboot to recovery
and install magisk zip.
Any time root and unroot:
2.going to recovery
Open recovery and install magisk zip. /Magisk uninstall
Click to expand...
Click to collapse
Thank a bunch for consist help with my nobby question(s)!
Correct me if i am wrong before i procced,
Fire up pc, open terminal/cmd and writing the following one after another
[Command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
[command]
Now i boot into twrp recovery and from there "wipe data". Then "advanced wipe" with delvic cache.
Next, again, twrp recovery and flash magisk.zip
Right?

Tanzin01
[Command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
fastboot reboot recovery
[command]
Now i boot into twrp recovery and from there "wipe ". Then "Format Data" with yes Format.
Next, Reboot to recovery .again, twrp recovery and flash magisk.zip
Right?

Thanks man. Have a nice day&life
hey man, all went well till format. in format i saw some error, eg failed to mount /data(something like this). Any idaea why i got this?
[i got a success msg though]]
also can i access twrp recovery mode via volume and power button?(i tried volume up+power button but got adnroid image with "No command".)

Command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
fastboot reboot recovery
[command]
Now boot into twrp recovery and from there "wipe option ->Format Data -> yes Format .
Next,
Reboot options -> recovery click Wait reboot to recovery and magisk.zip flash

Parvej789 said:
Command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
fastboot reboot recovery
[command]
Now i boot into twrp recovery and from there "wipe ". Then "Format Data" with yes Format.
Next,
Reboot options to recovery .again, twrp recovery and flash magisk.zip
Right?
Click to expand...
Click to collapse
All the commands worked smoothly but when again tried to go twrp recovery for rooting, I can't seem to find twrp. I got no command with Android pic and after few seconds default device recovery option. From where I can navigate to fastboot, recovery, wipe and etc.
"
Next,
Reboot options to recovery .again, tw
Parvej789 said:
Next,
Reboot options to recovery .again, twrp recovery and flash magisk.zip
Right?
Click to expand...
Click to collapse
Not sure what you mean by this. But tried
[Command]
adb reboot bootloader
fastboot reboot recovery
[Command]
Which took me to deafult recovery, no Twrp this time.
However I spent some time on xda and found this Command "fastboot boot twrp.img". Will try tomorrow again, will let you know if it worked! Man I'm probably bothering you!

Tanzin01 said:
"
Next,
Reboot options to recovery .again, tw
Not sure what you mean by this. But tried
[Command]
adb reboot bootloader
fastboot reboot recovery
[Command]
Which took me to deafult recovery, no Twrp this time.
However I spent some time on xda and found this Command "fastboot boot twrp.img". Will try tomorrow again, will let you know if it worked! Man I'm probably bothering you!
Click to expand...
Click to collapse
[command]
adb devices
adb reboot bootloader
fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot flash vbmeta vbmeta.img
fastboot reboot recovery
[command]
Now boot into twrp recovery and from there "wipe option->Format Data -> yes Format and back home menu
Next, Reboot option -> recovery click Wait reboot recovery and flash magisk.zip

Unorganized posts! Its xda's fault. Your edited post wasn't shown to me until my last post was posted!
Thanks man. This time I got it. I wrongly rebooted after "format data". I will reflash the twrp file again tomorrow.
Hey, i got myself in trouble again! Everything was working fine till i clicked on "Erase data" from settings. Now i cant boot into sytem, always booting into twrp.Any help?
Should i try flashing android 11, the one you provided here?

Tanzin01 said:
Hey, i got myself in trouble again! Everything was working fine till i clicked on "Erase data" from settings. Now i cant boot into sytem, always booting into twrp.Any help?
Should i try flashing android 11, the one you provided here?
Click to expand...
Click to collapse
Stock recovery.img flash and reboot

To make sure, i am donig as you described,
download stock firmware and get recovery.img.
now flash it: fastboot flash recovery recovery.img
Now reboot, right?
Btw cant i just flash andoid 11 altogether? (and thanks for your constant help

Tanzin01 said:
To make sure, i am donig as you described,
download stock firmware and get recovery.img.
now flash it: fastboot flash recovery recovery.img
Now reboot, right?
Btw cant i just flash andoid 11 altogether? (and thanks for your constant help :fashfashfashfash)
Click to expand...
Click to collapse
Yes
Or
Full flash
KD7-H6211FQRSTU-Q-GL-210520V392.zip
drive.google.com

how to do full flash?
[command]
fastboot flash system FullFlashfirmware.zip
[command]
or
sideload the zip file and then swipe install via twrp?

No .
PC to mobile(fastboot flash)
Now connect device to PC
Unzip flash file PC
Folder open
Click flash.bat
CMD open:
1.Do you want to Reboot device into fastboot [Y/N]=y type enter
2.wipe user data [Y/N]=y type enter
Then flash started
FLASHING success
Reboot to phone on

sadly im not on windows. Anyway thnx. i will try and see flashing recovery. Will let you know the result.

Stock recovery.img flash and reboot options->system click.
Reboot to phone on

Parvej789 said:
Stock recovery.img flash and reboot options->system click.
Reboot to phone on
Click to expand...
Click to collapse
got error
```
fastboot flash recovery recovery.img
Sending 'recovery' (39936 KB)
FAILED (Write to device failed (No such device))
fastboot: error: Command failed
``
tried changing cable but no change.
Oky so i had a hunch, and it was correct. i mounted system and didnt get that error.
Thanks buddy. Took me few tries and combination. but now im back with my device. And as guessed, twrp was/is the culprit. It was locking the system or something like this, perhaps a glich? anyway had to mount system and already wrote the command on terminal, so as soon as phone screen turns on, i get to send the data from pc to phone before phone starts doing many of its stuff.

Wipe option->format data -yes
Reboot option-> recovery and Twrp open
1.boot.img flash
2.super.img flash
3.recovery.img flash
Than reboot
Tanzin01 said:
Thanks buddy. Took me few tries and combination. but now im back with my device. And as guessed, twrp was/is the culprit. It was locking the system or something like this, perhaps a glich? anyway had to mount system and already wrote the command on terminal, so as soon as phone screen turns on, i get to send the data from pc to phone before phone starts doing many of its stuff.
Click to expand...
Click to collapse
Build version correct
Your build version